679856940 has 144 divisors (see below), whose sum is σ = 2363280192. Its totient is φ = 154971648.

The previous prime is 679856909. The next prime is 679856963. The reversal of 679856940 is 49658976.

679856940 is a `hidden beast` number, since 6 + 79 + 8 + 569 + 4 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 852622 + ... + 853418.

It is an arithmetic number, because the mean of its divisors is an integer number (16411668).

Almost surely, 2^679856940 is an apocalyptic number.

679856940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679856940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181640096).

679856940 is an abundant number, since it is smaller than the sum of its proper divisors (1683423252).

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

679856940 is a wasteful number, since it uses less digits than its factorization.

679856940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 679856940 is about 26074.0664262405. The cubic root of 679856940 is about 879.3042624151.

The spelling of 679856940 in words is "six hundred seventy-nine million, eight hundred fifty-six thousand, nine hundred forty".