8623972644 has 48 divisors (see below), whose sum is σ = 23002377216. Its totient is φ = 2463444000.

The previous prime is 8623972627. The next prime is 8623972657. The reversal of 8623972644 is 4462793268.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508339 + ... + 525029.

It is an arithmetic number, because the mean of its divisors is an integer number (479216192).

Almost surely, 2^8623972644 is an apocalyptic number.

8623972644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8623972644 is an abundant number, since it is smaller than the sum of its proper divisors (14378404572).

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

8623972644 is a wasteful number, since it uses less digits than its factorization.

8623972644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22856 (or 22854 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The square root of 8623972644 is about 92865.3468415426. The cubic root of 8623972644 is about 2050.7015361423.

The spelling of 8623972644 in words is "eight billion, six hundred twenty-three million, nine hundred seventy-two thousand, six hundred forty-four".