15889972 has 12 divisors (see below), whose sum is σ = 31780000. Its totient is φ = 6809976.

The previous prime is 15889963. The next prime is 15889997. The reversal of 15889972 is 27998851.

15889972 is an admirable number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283722 + ... + 283777.

Almost surely, 2^15889972 is an apocalyptic number.

It is an amenable number.

15889972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15889972 is a wasteful number, since it uses less digits than its factorization.

15889972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567510 (or 567508 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The square root of 15889972 is about 3986.2227735038. Note that the first 3 decimals coincide. The cubic root of 15889972 is about 251.4052700636.

It can be divided in two parts, 15889 and 972, that added together give a palindrome (16861).

The spelling of 15889972 in words is "fifteen million, eight hundred eighty-nine thousand, nine hundred seventy-two".