679057992 has 40 divisors (see below), whose sum is σ = 1901992950. Its totient is φ = 226352448.

The previous prime is 679057961. The next prime is 679058011. The reversal of 679057992 is 299750976.

679057992 is a `hidden beast` number, since 67 + 9 + 0 + 579 + 9 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 637764516 + 41293476 = 25254^2 + 6426^2 .

It is a super-2 number, since 2×679057992² = 922239512998144128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 523317 + ... + 524612.

Almost surely, 2^679057992 is an apocalyptic number.

It is an amenable number.

679057992 is an abundant number, since it is smaller than the sum of its proper divisors (1222934958).

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

679057992 is a wasteful number, since it uses less digits than its factorization.

679057992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047947 (or 1047934 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 679057992 is about 26058.7411821830. The cubic root of 679057992 is about 878.9596831792.

The spelling of 679057992 in words is "six hundred seventy-nine million, fifty-seven thousand, nine hundred ninety-two".