679684880 has 120 divisors (see below), whose sum is σ = 1883551320. Its totient is φ = 227297280.

The previous prime is 679684849. The next prime is 679684913. The reversal of 679684880 is 88486976.

It can be written as a sum of positive squares in 4 ways, for example, as 103876864 + 575808016 = 10192^2 + 23996^2 .

It is a super-2 number, since 2×679684880² = 923943072201228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 158606 + ... + 162834.

It is an arithmetic number, because the mean of its divisors is an integer number (15696261).

Almost surely, 2^679684880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679684880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941775660).

679684880 is an abundant number, since it is smaller than the sum of its proper divisors (1203866440).

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

679684880 is a wasteful number, since it uses less digits than its factorization.

679684880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4284 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 679684880 is about 26070.7667704653. The cubic root of 679684880 is about 879.2300772704.

The spelling of 679684880 in words is "six hundred seventy-nine million, six hundred eighty-four thousand, eight hundred eighty".