815952885 has 32 divisors (see below), whose sum is σ = 1426578048. Its totient is φ = 394955520.

The previous prime is 815952871. The next prime is 815952913. The reversal of 815952885 is 588259518.

It is not a de Polignac number, because 815952885 - 2⁹ = 815952373 is a prime.

It is a super-2 number, since 2×815952885² = 1331558221079646450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103959 + ... + 111531.

It is an arithmetic number, because the mean of its divisors is an integer number (44580564).

Almost surely, 2^815952885 is an apocalyptic number.

It is an amenable number.

815952885 is a deficient number, since it is larger than the sum of its proper divisors (610625163).

815952885 is a wasteful number, since it uses less digits than its factorization.

815952885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245.

The product of its digits is 1152000, while the sum is 51.

The square root of 815952885 is about 28564.8890248151. The cubic root of 815952885 is about 934.4477602948.

The spelling of 815952885 in words is "eight hundred fifteen million, nine hundred fifty-two thousand, eight hundred eighty-five".