680540 has 24 divisors (see below), whose sum is σ = 1633632. Its totient is φ = 233280.

The previous prime is 680539. The next prime is 680567. The reversal of 680540 is 45086.

It is a congruent 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, 2291 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (68068).

2⁶⁸⁰⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

680540 is an abundant number, since it is smaller than the sum of its proper divisors (953092).

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

680540 is a wasteful number, since it uses less digits than its factorization.

680540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877 (or 4875 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 680540 is about 824.9484832400. The cubic root of 680540 is about 87.9598646178.

The spelling of 680540 in words is "six hundred eighty thousand, five hundred forty".