813351320 has 32 divisors (see below), whose sum is σ = 1833811920. Its totient is φ = 324670080.

The previous prime is 813351311. The next prime is 813351337. The reversal of 813351320 is 23153318.

It is a self number, because there is not a number n which added to its sum of digits gives 813351320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067 + ... + 40346.

Almost surely, 2^813351320 is an apocalyptic number.

It is an amenable number.

813351320 is an abundant number, since it is smaller than the sum of its proper divisors (1020460600).

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

813351320 is a wasteful number, since it uses less digits than its factorization.

813351320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41915 (or 41911 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 813351320 is about 28519.3148585305. The cubic root of 813351320 is about 933.4535791787.

The spelling of 813351320 in words is "eight hundred thirteen million, three hundred fifty-one thousand, three hundred twenty".