812653256 has 32 divisors (see below), whose sum is σ = 1631124000. Its totient is φ = 378412416.

The previous prime is 812653243. The next prime is 812653271. The reversal of 812653256 is 652356218.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36341 + ... + 54276.

It is an arithmetic number, because the mean of its divisors is an integer number (50972625).

Almost surely, 2^812653256 is an apocalyptic number.

It is an amenable number.

812653256 is an abundant number, since it is smaller than the sum of its proper divisors (818470744).

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

812653256 is a wasteful number, since it uses less digits than its factorization.

812653256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90701 (or 90697 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 812653256 is about 28507.0737887985. The cubic root of 812653256 is about 933.1864552318.

The spelling of 812653256 in words is "eight hundred twelve million, six hundred fifty-three thousand, two hundred fifty-six".