9156990 has 48 divisors (see below), whose sum is σ = 23013648. Its totient is φ = 2331648.

The previous prime is 9156989. The next prime is 9157003. The reversal of 9156990 is 996519.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15582 + ... + 16158.

It is an arithmetic number, because the mean of its divisors is an integer number (479451).

Almost surely, 2^9156990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9156990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11506824).

9156990 is an abundant number, since it is smaller than the sum of its proper divisors (13856658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9156990 is a wasteful number, since it uses less digits than its factorization.

9156990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 9156990 is about 3026.0518832300. The cubic root of 9156990 is about 209.2108705554.

The spelling of 9156990 in words is "nine million, one hundred fifty-six thousand, nine hundred ninety".