680861424 has 80 divisors (see below), whose sum is σ = 1866523392. Its totient is φ = 213126144.

The previous prime is 680861413. The next prime is 680861453. The reversal of 680861424 is 424168086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605727 + ... + 606849.

Almost surely, 2^680861424 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 680861424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933261696).

680861424 is an abundant number, since it is smaller than the sum of its proper divisors (1185661968).

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

680861424 is a wasteful number, since it uses less digits than its factorization.

680861424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 680861424 is about 26093.3214443850. The cubic root of 680861424 is about 879.7371046648.

The spelling of 680861424 in words is "six hundred eighty million, eight hundred sixty-one thousand, four hundred twenty-four".