679649280 has 112 divisors (see below), whose sum is σ = 2175138144. Its totient is φ = 181207040.

The previous prime is 679649237. The next prime is 679649293. The reversal of 679649280 is 82946976.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120115 + ... + 125645.

Almost surely, 2^679649280 is an apocalyptic number.

679649280 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 679649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1087569072).

679649280 is an abundant number, since it is smaller than the sum of its proper divisors (1495488864).

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

679649280 is an equidigital number, since it uses as much as digits as its factorization.

679649280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5541 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 679649280 is about 26070.0840044676. The cubic root of 679649280 is about 879.2147264619.

The spelling of 679649280 in words is "six hundred seventy-nine million, six hundred forty-nine thousand, two hundred eighty".