679830840 has 256 divisors, whose sum is σ = 2502057600. Its totient is φ = 163123200.

The previous prime is 679830779. The next prime is 679830869. The reversal of 679830840 is 48038976.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 575050 + ... + 576230.

Almost surely, 2^679830840 is an apocalyptic number.

679830840 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 679830840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251028800).

679830840 is an abundant number, since it is smaller than the sum of its proper divisors (1822226760).

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

679830840 is a wasteful number, since it uses less digits than its factorization.

679830840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 679830840 is about 26073.5659241309. The cubic root of 679830840 is about 879.2930099816.

The spelling of 679830840 in words is "six hundred seventy-nine million, eight hundred thirty thousand, eight hundred forty".