8972640392 has 16 divisors (see below), whose sum is σ = 17813330460. Its totient is φ = 4222418944.

The previous prime is 8972640373. The next prime is 8972640493. The reversal of 8972640392 is 2930462798.

It can be written as a sum of positive squares in 2 ways, for example, as 8520397636 + 452242756 = 92306^2 + 21266^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8972640392.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32987513 + ... + 32987784.

Almost surely, 2^8972640392 is an apocalyptic number.

It is an amenable number.

8972640392 is a deficient number, since it is larger than the sum of its proper divisors (8840690068).

8972640392 is a wasteful number, since it uses less digits than its factorization.

8972640392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65975320 (or 65975316 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 8972640392 is about 94724.0222541252. The cubic root of 8972640392 is about 2077.9738955018.

The spelling of 8972640392 in words is "eight billion, nine hundred seventy-two million, six hundred forty thousand, three hundred ninety-two".