815808072 has 16 divisors (see below), whose sum is σ = 2039520240. Its totient is φ = 271936016.

The previous prime is 815808061. The next prime is 815808089. The reversal of 815808072 is 270808518.

It is a self number, because there is not a number n which added to its sum of digits gives 815808072.

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 in 3 ways as a sum of consecutive naturals, for example, 16995978 + ... + 16996025.

It is an arithmetic number, because the mean of its divisors is an integer number (127470015).

Almost surely, 2^815808072 is an apocalyptic number.

It is an amenable number.

815808072 is an abundant number, since it is smaller than the sum of its proper divisors (1223712168).

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

815808072 is a wasteful number, since it uses less digits than its factorization.

815808072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33992012 (or 33992008 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 815808072 is about 28562.3541046602. The cubic root of 815808072 is about 934.3924759795.

The spelling of 815808072 in words is "eight hundred fifteen million, eight hundred eight thousand, seventy-two".