815306864 has 10 divisors (see below), whose sum is σ = 1579657080. Its totient is φ = 407653424.

The previous prime is 815306837. The next prime is 815306879. The reversal of 815306864 is 468603518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25478324 + ... + 25478355.

It is an arithmetic number, because the mean of its divisors is an integer number (157965708).

Almost surely, 2^815306864 is an apocalyptic number.

It is an amenable number.

815306864 is a deficient number, since it is larger than the sum of its proper divisors (764350216).

815306864 is a wasteful number, since it uses less digits than its factorization.

815306864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50956687 (or 50956681 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 815306864 is about 28553.5788299821. The cubic root of 815306864 is about 934.2010825455.

The spelling of 815306864 in words is "eight hundred fifteen million, three hundred six thousand, eight hundred sixty-four".