864685580 has 24 divisors (see below), whose sum is σ = 1980916560. Its totient is φ = 314431040.

The previous prime is 864685567. The next prime is 864685607. The reversal of 864685580 is 85586468.

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, 1964975 + ... + 1965414.

It is an arithmetic number, because the mean of its divisors is an integer number (82538190).

Almost surely, 2^864685580 is an apocalyptic number.

It is an amenable number.

864685580 is an abundant number, since it is smaller than the sum of its proper divisors (1116230980).

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

864685580 is a wasteful number, since it uses less digits than its factorization.

864685580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930409 (or 3930407 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 50.

The square root of 864685580 is about 29405.5365535132. The cubic root of 864685580 is about 952.6924836552.

The spelling of 864685580 in words is "eight hundred sixty-four million, six hundred eighty-five thousand, five hundred eighty".