864466856 has 16 divisors (see below), whose sum is σ = 1768227840. Its totient is φ = 392939440.

The previous prime is 864466843. The next prime is 864466877. The reversal of 864466856 is 658664468.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 864466798 and 864466807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4911656 + ... + 4911831.

It is an arithmetic number, because the mean of its divisors is an integer number (110514240).

Almost surely, 2^864466856 is an apocalyptic number.

It is an amenable number.

864466856 is an abundant number, since it is smaller than the sum of its proper divisors (903760984).

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

864466856 is a wasteful number, since it uses less digits than its factorization.

864466856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9823504 (or 9823500 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 53.

The square root of 864466856 is about 29401.8172227500. The cubic root of 864466856 is about 952.6121483719.

The spelling of 864466856 in words is "eight hundred sixty-four million, four hundred sixty-six thousand, eight hundred fifty-six".