813894712 has 32 divisors (see below), whose sum is σ = 1591040880. Its totient is φ = 389975040.

The previous prime is 813894691. The next prime is 813894749. The reversal of 813894712 is 217498318.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4089 + ... + 40552.

Almost surely, 2^813894712 is an apocalyptic number.

It is an amenable number.

813894712 is a deficient number, since it is larger than the sum of its proper divisors (777146168).

813894712 is a wasteful number, since it uses less digits than its factorization.

813894712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44743 (or 44739 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 813894712 is about 28528.8400044586. The cubic root of 813894712 is about 933.6614099475.

The spelling of 813894712 in words is "eight hundred thirteen million, eight hundred ninety-four thousand, seven hundred twelve".