679979520 has 240 divisors, whose sum is σ = 2570005152. Its totient is φ = 164782080.

The previous prime is 679979507. The next prime is 679979537. The reversal of 679979520 is 25979976.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252099 + ... + 254781.

Almost surely, 2^679979520 is an apocalyptic number.

679979520 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 679979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285002576).

679979520 is an abundant number, since it is smaller than the sum of its proper divisors (1890025632).

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

679979520 is a wasteful number, since it uses less digits than its factorization.

679979520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723 (or 2704 counting only the distinct ones).

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

The square root of 679979520 is about 26076.4169317796. The cubic root of 679979520 is about 879.3571061987.

The spelling of 679979520 in words is "six hundred seventy-nine million, nine hundred seventy-nine thousand, five hundred twenty".