812668328 has 32 divisors (see below), whose sum is σ = 1547804160. Its totient is φ = 399966720.

The previous prime is 812668319. The next prime is 812668369. The reversal of 812668328 is 823866218.

It is a super-2 number, since 2×812668328² = 1320859622668631168, which contains 22 as substring.

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, 145475 + ... + 150957.

It is an arithmetic number, because the mean of its divisors is an integer number (48368880).

Almost surely, 2^812668328 is an apocalyptic number.

It is an amenable number.

812668328 is a deficient number, since it is larger than the sum of its proper divisors (735135832).

812668328 is a wasteful number, since it uses less digits than its factorization.

812668328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777 (or 5773 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 812668328 is about 28507.3381430115. The cubic root of 812668328 is about 933.1922243587.

The spelling of 812668328 in words is "eight hundred twelve million, six hundred sixty-eight thousand, three hundred twenty-eight".