812845944 has 48 divisors (see below), whose sum is σ = 2297178000. Its totient is φ = 259167744.

The previous prime is 812845909. The next prime is 812845949. The reversal of 812845944 is 449548218.

It is a super-2 number, since 2×812845944² = 1321437057354502272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 812845944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812845949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243769 + ... + 247080.

It is an arithmetic number, because the mean of its divisors is an integer number (47857875).

Almost surely, 2^812845944 is an apocalyptic number.

It is an amenable number.

812845944 is an abundant number, since it is smaller than the sum of its proper divisors (1484332056).

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

812845944 is a wasteful number, since it uses less digits than its factorization.

812845944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490884 (or 490877 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 812845944 is about 28510.4532408729. The cubic root of 812845944 is about 933.2602052682.

The spelling of 812845944 in words is "eight hundred twelve million, eight hundred forty-five thousand, nine hundred forty-four".