815228868 has 12 divisors (see below), whose sum is σ = 1902200720. Its totient is φ = 271742952.

The previous prime is 815228861. The next prime is 815228893. The reversal of 815228868 is 868822518.

It is a happy number.

815228868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×815228868² = 1329196214441122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (815228861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33967858 + ... + 33967881.

Almost surely, 2^815228868 is an apocalyptic number.

It is an amenable number.

815228868 is an abundant number, since it is smaller than the sum of its proper divisors (1086971852).

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

815228868 is a wasteful number, since it uses less digits than its factorization.

815228868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67935746 (or 67935744 counting only the distinct ones).

The product of its digits is 491520, while the sum is 48.

The square root of 815228868 is about 28552.2130140555. The cubic root of 815228868 is about 934.1712916065.

The spelling of 815228868 in words is "eight hundred fifteen million, two hundred twenty-eight thousand, eight hundred sixty-eight".