815964090 has 16 divisors (see below), whose sum is σ = 1958313888. Its totient is φ = 217590416.

The previous prime is 815964053. The next prime is 815964091. The reversal of 815964090 is 90469518.

It is not an unprimeable number, because it can be changed into a prime (815964091) 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, 13599372 + ... + 13599431.

It is an arithmetic number, because the mean of its divisors is an integer number (122394618).

Almost surely, 2^815964090 is an apocalyptic number.

815964090 is an abundant number, since it is smaller than the sum of its proper divisors (1142349798).

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

815964090 is a wasteful number, since it uses less digits than its factorization.

815964090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27198813.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 815964090 is about 28565.0851565333. The cubic root of 815964090 is about 934.4520376820.

The spelling of 815964090 in words is "eight hundred fifteen million, nine hundred sixty-four thousand, ninety".