680408 has 16 divisors (see below), whose sum is σ = 1351080. Its totient is φ = 320128.

The previous prime is 680401. The next prime is 680411. The reversal of 680408 is 804086.

680408 = 192² + 193² + ... + 208².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680401) by changing a digit.

680408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366 + ... + 2637.

2⁶⁸⁰⁴⁰⁸ is an apocalyptic number.

680408 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

680408 is a deficient number, since it is larger than the sum of its proper divisors (670672).

680408 is a wasteful number, since it uses less digits than its factorization.

680408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 680408 is about 824.8684743642. The cubic root of 680408 is about 87.9541772456.

The spelling of 680408 in words is "six hundred eighty thousand, four hundred eight".