812717436 has 24 divisors (see below), whose sum is σ = 2007890640. Its totient is φ = 254970112.

The previous prime is 812717417. The next prime is 812717441. The reversal of 812717436 is 634717218.

It is a junction number, because it is equal to n+sod(n) for n = 812717394 and 812717403.

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, 1991751 + ... + 1992158.

It is an arithmetic number, because the mean of its divisors is an integer number (83662110).

Almost surely, 2^812717436 is an apocalyptic number.

It is an amenable number.

812717436 is an abundant number, since it is smaller than the sum of its proper divisors (1195173204).

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

812717436 is a wasteful number, since it uses less digits than its factorization.

812717436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983933 (or 3983931 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 812717436 is about 28508.1994520875. The cubic root of 812717436 is about 933.2110209899.

The spelling of 812717436 in words is "eight hundred twelve million, seven hundred seventeen thousand, four hundred thirty-six".