815900930 has 16 divisors (see below), whose sum is σ = 1581592824. Its totient is φ = 301255680.

The previous prime is 815900929. The next prime is 815900933. The reversal of 815900930 is 39009518.

It can be written as a sum of positive squares in 4 ways, for example, as 467294689 + 348606241 = 21617^2 + 18671^2 .

It is not an unprimeable number, because it can be changed into a prime (815900933) 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, 3137951 + ... + 3138210.

Almost surely, 2^815900930 is an apocalyptic number.

815900930 is a deficient number, since it is larger than the sum of its proper divisors (765691894).

815900930 is a wasteful number, since it uses less digits than its factorization.

815900930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276181.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 815900930 is about 28563.9795896860. The cubic root of 815900930 is about 934.4279265255.

The spelling of 815900930 in words is "eight hundred fifteen million, nine hundred thousand, nine hundred thirty".