815538630 has 32 divisors (see below), whose sum is σ = 1967242464. Its totient is φ = 216371456.

The previous prime is 815538599. The next prime is 815538649. The reversal of 815538630 is 36835518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63087 + ... + 74906.

It is an arithmetic number, because the mean of its divisors is an integer number (61476327).

Almost surely, 2^815538630 is an apocalyptic number.

815538630 is an abundant number, since it is smaller than the sum of its proper divisors (1151703834).

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

815538630 is a wasteful number, since it uses less digits than its factorization.

815538630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138200.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 815538630 is about 28557.6369820754. The cubic root of 815538630 is about 934.2895954498.

The spelling of 815538630 in words is "eight hundred fifteen million, five hundred thirty-eight thousand, six hundred thirty".