864426864 has 40 divisors (see below), whose sum is σ = 2552118400. Its totient is φ = 246979008.

The previous prime is 864426841. The next prime is 864426883. The reversal of 864426864 is 468624468.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

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, 1286014 + ... + 1286685.

It is an arithmetic number, because the mean of its divisors is an integer number (63802960).

Almost surely, 2^864426864 is an apocalyptic number.

864426864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

864426864 is an abundant number, since it is smaller than the sum of its proper divisors (1687691536).

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

864426864 is a wasteful number, since it uses less digits than its factorization.

864426864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572717 (or 2572711 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 48.

The square root of 864426864 is about 29401.1371208666. The cubic root of 864426864 is about 952.5974582184.

The spelling of 864426864 in words is "eight hundred sixty-four million, four hundred twenty-six thousand, eight hundred sixty-four".