810813400 has 48 divisors (see below), whose sum is σ = 1917120600. Its totient is φ = 318823680.

The previous prime is 810813379. The next prime is 810813413. The reversal of 810813400 is 4318018.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22557 + ... + 46156.

Almost surely, 2^810813400 is an apocalyptic number.

It is an amenable number.

810813400 is an abundant number, since it is smaller than the sum of its proper divisors (1106307200).

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

810813400 is a wasteful number, since it uses less digits than its factorization.

810813400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68788 (or 68779 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 810813400 is about 28474.7853372067. The cubic root of 810813400 is about 932.4816749197.

The spelling of 810813400 in words is "eight hundred ten million, eight hundred thirteen thousand, four hundred".