813882520 has 32 divisors (see below), whose sum is σ = 1997712720. Its totient is φ = 295957120.

The previous prime is 813882449. The next prime is 813882523. The reversal of 813882520 is 25288318.

It is a self number, because there is not a number n which added to its sum of digits gives 813882520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813882523) 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, 924427 + ... + 925306.

Almost surely, 2^813882520 is an apocalyptic number.

It is an amenable number.

813882520 is an abundant number, since it is smaller than the sum of its proper divisors (1183830200).

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

813882520 is a wasteful number, since it uses less digits than its factorization.

813882520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849755 (or 1849751 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 813882520 is about 28528.6263251493. The cubic root of 813882520 is about 933.6567478962.

The spelling of 813882520 in words is "eight hundred thirteen million, eight hundred eighty-two thousand, five hundred twenty".