812170432 has 28 divisors (see below), whose sum is σ = 1621322640. Its totient is φ = 403648256.

The previous prime is 812170423. The next prime is 812170451. The reversal of 812170432 is 234071218.

It is a self number, because there is not a number n which added to its sum of digits gives 812170432.

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, 27307 + ... + 48682.

It is an arithmetic number, because the mean of its divisors is an integer number (57904380).

Almost surely, 2^812170432 is an apocalyptic number.

It is an amenable number.

812170432 is a deficient number, since it is larger than the sum of its proper divisors (809152208).

812170432 is a wasteful number, since it uses less digits than its factorization.

812170432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76168 (or 76158 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 812170432 is about 28498.6040359874. The cubic root of 812170432 is about 933.0016063740.

The spelling of 812170432 in words is "eight hundred twelve million, one hundred seventy thousand, four hundred thirty-two".