815470764 has 12 divisors (see below), whose sum is σ = 1902765144. Its totient is φ = 271823584.

The previous prime is 815470759. The next prime is 815470781. The reversal of 815470764 is 467074518.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33977937 + ... + 33977960.

It is an arithmetic number, because the mean of its divisors is an integer number (158563762).

Almost surely, 2^815470764 is an apocalyptic number.

It is an amenable number.

815470764 is an abundant number, since it is smaller than the sum of its proper divisors (1087294380).

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

815470764 is a wasteful number, since it uses less digits than its factorization.

815470764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67955904 (or 67955902 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 815470764 is about 28556.4487287898. The cubic root of 815470764 is about 934.2636787307.

The spelling of 815470764 in words is "eight hundred fifteen million, four hundred seventy thousand, seven hundred sixty-four".