15996972 has 24 divisors (see below), whose sum is σ = 37422000. Its totient is φ = 5318656.

The previous prime is 15996971. The next prime is 15996997. The reversal of 15996972 is 27969951.

It is a super-2 number, since 2×15996972² = 511806226337568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15996971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3904 + ... + 6872.

It is an arithmetic number, because the mean of its divisors is an integer number (1559250).

Almost surely, 2^15996972 is an apocalyptic number.

15996972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15996972 is an abundant number, since it is smaller than the sum of its proper divisors (21425028).

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

15996972 is a wasteful number, since it uses less digits than its factorization.

15996972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3423 counting only the distinct ones).

The product of its digits is 306180, while the sum is 48.

The square root of 15996972 is about 3999.6214820905. The cubic root of 15996972 is about 251.9683129722.

The spelling of 15996972 in words is "fifteen million, nine hundred ninety-six thousand, nine hundred seventy-two".