815899960 has 32 divisors (see below), whose sum is σ = 1857900240. Its totient is φ = 322426624.

The previous prime is 815899951. The next prime is 815899969. The reversal of 815899960 is 69998518.

It is an interprime number because it is at equal distance from previous prime (815899951) and next prime (815899969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815899969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119557 + ... + 126196.

Almost surely, 2^815899960 is an apocalyptic number.

It is an amenable number.

815899960 is an abundant number, since it is smaller than the sum of its proper divisors (1042000280).

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

815899960 is a wasteful number, since it uses less digits than its factorization.

815899960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245847 (or 245843 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 815899960 is about 28563.9626102542. The cubic root of 815899960 is about 934.4275562210.

It can be divided in two parts, 81 and 5899960, that added together give a square (5900041 = 2429²).

The spelling of 815899960 in words is "eight hundred fifteen million, eight hundred ninety-nine thousand, nine hundred sixty".