680629440 has 56 divisors (see below), whose sum is σ = 2161001520. Its totient is φ = 181500928.

The previous prime is 680629403. The next prime is 680629511. The reversal of 680629440 is 44926086.

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, 353535 + ... + 355454.

Almost surely, 2^680629440 is an apocalyptic number.

680629440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

680629440 is an abundant number, since it is smaller than the sum of its proper divisors (1480372080).

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

680629440 is a wasteful number, since it uses less digits than its factorization.

680629440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709009 (or 708999 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 680629440 is about 26088.8757902674. The cubic root of 680629440 is about 879.6371782538.

The spelling of 680629440 in words is "six hundred eighty million, six hundred twenty-nine thousand, four hundred forty".