9990

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 6 (4 unique) factors are:
2
3³ = 27
5
37

Its 32 divisors are:
1
2
3
5
6
9
10
15
18
27
30
37
45
54
74
90
111
135
185
222
270
333
370
555
666
999
1110
1665
1998
3330
4995
9990
Its aliquote sum is:
17370
makeing it a abundant number.

As Unicode codepoint (since version 1.1) this number represents this character:✆ TELEPHONE LOCATION SIGN in Dingbats (Source: https://ucdapi.org/unicode/latest/codepoint/dec/9990); HTML: ✆

The number appears at position 25584 of the decimal digits of π surrounded by
76607717052771876011999081441130586455779105 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 875.164ms; cpu: 164.697ms)