812809344 has 32 divisors (see below), whose sum is σ = 2159025840. Its totient is φ = 270936320.

The previous prime is 812809337. The next prime is 812809391. The reversal of 812809344 is 443908218.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057962 + ... + 1058729.

Almost surely, 2^812809344 is an apocalyptic number.

It is an amenable number.

812809344 is an abundant number, since it is smaller than the sum of its proper divisors (1346216496).

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

812809344 is a wasteful number, since it uses less digits than its factorization.

812809344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116708 (or 2116696 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 812809344 is about 28509.8113638095. The cubic root of 812809344 is about 933.2461977610.

The spelling of 812809344 in words is "eight hundred twelve million, eight hundred nine thousand, three hundred forty-four".