15791972 has 12 divisors (see below), whose sum is σ = 31584000. Its totient is φ = 6767976.

The previous prime is 15791969. The next prime is 15791977. The reversal of 15791972 is 27919751.

It is a happy number.

15791972 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15791977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281972 + ... + 282027.

It is an arithmetic number, because the mean of its divisors is an integer number (2632000).

Almost surely, 2^15791972 is an apocalyptic number.

It is an amenable number.

15791972 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.

15791972 is a wasteful number, since it uses less digits than its factorization.

15791972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564010 (or 564008 counting only the distinct ones).

The product of its digits is 39690, while the sum is 41.

The square root of 15791972 is about 3973.9114232705. The cubic root of 15791972 is about 250.8873639477.

It can be divided in two parts, 157 and 91972, that added together give a palindrome (92129).

The spelling of 15791972 in words is "fifteen million, seven hundred ninety-one thousand, nine hundred seventy-two".