813491364 has 48 divisors (see below), whose sum is σ = 2204886656. Its totient is φ = 228614400.

The previous prime is 813491359. The next prime is 813491387. The reversal of 813491364 is 463194318.

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, 74257 + ... + 84504.

Almost surely, 2^813491364 is an apocalyptic number.

813491364 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

813491364 is an abundant number, since it is smaller than the sum of its proper divisors (1391395292).

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

813491364 is a wasteful number, since it uses less digits than its factorization.

813491364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158836 (or 158834 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 813491364 is about 28521.7700011763. The cubic root of 813491364 is about 933.5071505640.

The spelling of 813491364 in words is "eight hundred thirteen million, four hundred ninety-one thousand, three hundred sixty-four".