864500920 has 32 divisors (see below), whose sum is σ = 1950732000. Its totient is φ = 344803968.

The previous prime is 864500911. The next prime is 864500941. The reversal of 864500920 is 29005468.

It is a happy number.

It is a congruent number.

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, 17004 + ... + 44923.

It is an arithmetic number, because the mean of its divisors is an integer number (60960375).

Almost surely, 2^864500920 is an apocalyptic number.

It is an amenable number.

864500920 is an abundant number, since it is smaller than the sum of its proper divisors (1086231080).

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

864500920 is a wasteful number, since it uses less digits than its factorization.

864500920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62287 (or 62283 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 864500920 is about 29402.3965009657. The cubic root of 864500920 is about 952.6246606519.

The spelling of 864500920 in words is "eight hundred sixty-four million, five hundred thousand, nine hundred twenty".