813880500 has 48 divisors (see below), whose sum is σ = 2370024384. Its totient is φ = 217034400.

The previous prime is 813880499. The next prime is 813880511. The reversal of 813880500 is 5088318.

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, 269794 + ... + 272793.

It is an arithmetic number, because the mean of its divisors is an integer number (49375508).

Almost surely, 2^813880500 is an apocalyptic number.

It is an amenable number.

813880500 is an abundant number, since it is smaller than the sum of its proper divisors (1556143884).

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

813880500 is a wasteful number, since it uses less digits than its factorization.

813880500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542609 (or 542597 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 813880500 is about 28528.5909220908. The cubic root of 813880500 is about 933.6559754718.

The spelling of 813880500 in words is "eight hundred thirteen million, eight hundred eighty thousand, five hundred".