815853804 has 48 divisors (see below), whose sum is σ = 1943004672. Its totient is φ = 266348992.

The previous prime is 815853803. The next prime is 815853809. The reversal of 815853804 is 408358518.

It is not an unprimeable number, because it can be changed into a prime (815853803) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 700927 + ... + 702089.

It is an arithmetic number, because the mean of its divisors is an integer number (40479264).

Almost surely, 2^815853804 is an apocalyptic number.

It is an amenable number.

815853804 is an abundant number, since it is smaller than the sum of its proper divisors (1127150868).

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

815853804 is a wasteful number, since it uses less digits than its factorization.

815853804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 815853804 is about 28563.1546577054. The cubic root of 815853804 is about 934.4099354939.

The spelling of 815853804 in words is "eight hundred fifteen million, eight hundred fifty-three thousand, eight hundred four".