812361900 has 72 divisors (see below), whose sum is σ = 2686216960. Its totient is φ = 185682240.

The previous prime is 812361889. The next prime is 812361917. The reversal of 812361900 is 9163218.

It is a super-2 number, since 2×812361900² = 1319863713143220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191320 + ... + 195519.

Almost surely, 2^812361900 is an apocalyptic number.

It is an amenable number.

812361900 is an abundant number, since it is smaller than the sum of its proper divisors (1873855060).

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

812361900 is a wasteful number, since it uses less digits than its factorization.

812361900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386863 (or 386856 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 812361900 is about 28501.9630902856. The cubic root of 812361900 is about 933.0749185379.

The spelling of 812361900 in words is "eight hundred twelve million, three hundred sixty-one thousand, nine hundred".