679259140 has 96 divisors (see below), whose sum is σ = 1737469440. Its totient is φ = 217749504.

The previous prime is 679259129. The next prime is 679259179. The reversal of 679259140 is 41952976.

It is a happy number.

It is a super-2 number, since 2×679259140² = 922785958547079200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396606 + ... + 398314.

It is an arithmetic number, because the mean of its divisors is an integer number (18098640).

Almost surely, 2^679259140 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 679259140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868734720).

679259140 is an abundant number, since it is smaller than the sum of its proper divisors (1058210300).

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

679259140 is a wasteful number, since it uses less digits than its factorization.

679259140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 679259140 is about 26062.6004074804. The cubic root of 679259140 is about 879.0464619866.

The spelling of 679259140 in words is "six hundred seventy-nine million, two hundred fifty-nine thousand, one hundred forty".