15990156 has 96 divisors (see below), whose sum is σ = 51054080. Its totient is φ = 4214592.

The previous prime is 15990151. The next prime is 15990157. The reversal of 15990156 is 65109951.

It is a super-3 number, since 3×15990156³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15990156.

It is not an unprimeable number, because it can be changed into a prime (15990151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9015 + ... + 10641.

Almost surely, 2^15990156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15990156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25527040).

15990156 is an abundant number, since it is smaller than the sum of its proper divisors (35063924).

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

15990156 is a wasteful number, since it uses less digits than its factorization.

15990156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 15990156 is about 3998.7693106755. The cubic root of 15990156 is about 251.9325216154.

The spelling of 15990156 in words is "fifteen million, nine hundred ninety thousand, one hundred fifty-six".