864940972 has 24 divisors (see below), whose sum is σ = 1747015200. Its totient is φ = 367017600.

The previous prime is 864940939. The next prime is 864941023. The reversal of 864940972 is 279049468.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150097 + ... + 155752.

It is an arithmetic number, because the mean of its divisors is an integer number (72792300).

Almost surely, 2^864940972 is an apocalyptic number.

It is an amenable number.

864940972 is an abundant number, since it is smaller than the sum of its proper divisors (882074228).

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

864940972 is a wasteful number, since it uses less digits than its factorization.

864940972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305961 (or 305959 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 864940972 is about 29409.8788164793. The cubic root of 864940972 is about 952.7862696100.

It can be divided in two parts, 8649409 and 72, that added together give a square (8649481 = 2941²).

The spelling of 864940972 in words is "eight hundred sixty-four million, nine hundred forty thousand, nine hundred seventy-two".