812315800 has 24 divisors (see below), whose sum is σ = 1888634700. Its totient is φ = 324926240.

The previous prime is 812315761. The next prime is 812315809. The reversal of 812315800 is 8513218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812315809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2030590 + ... + 2030989.

Almost surely, 2^812315800 is an apocalyptic number.

It is an amenable number.

812315800 is an abundant number, since it is smaller than the sum of its proper divisors (1076318900).

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

812315800 is a wasteful number, since it uses less digits than its factorization.

812315800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4061595 (or 4061586 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 812315800 is about 28501.1543625868. The cubic root of 812315800 is about 933.0572681256.

The spelling of 812315800 in words is "eight hundred twelve million, three hundred fifteen thousand, eight hundred".