8972639956 has 12 divisors (see below), whose sum is σ = 17945279968. Its totient is φ = 3845417112.

The previous prime is 8972639903. The next prime is 8972639987. The reversal of 8972639956 is 6599362798.

8972639956 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160225686 + ... + 160225741.

Almost surely, 2^8972639956 is an apocalyptic number.

It is an amenable number.

8972639956 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.

8972639956 is a wasteful number, since it uses less digits than its factorization.

8972639956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320451438 (or 320451436 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 64.

The square root of 8972639956 is about 94724.0199527026. The cubic root of 8972639956 is about 2077.9738618440.

The spelling of 8972639956 in words is "eight billion, nine hundred seventy-two million, six hundred thirty-nine thousand, nine hundred fifty-six".