680513808 has 80 divisors (see below), whose sum is σ = 2004621696. Its totient is φ = 197068800.

The previous prime is 680513807. The next prime is 680513809. The reversal of 680513808 is 808315086.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (680513807) and next prime (680513809).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (680513807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21468 + ... + 42683.

Almost surely, 2^680513808 is an apocalyptic number.

680513808 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

680513808 is an abundant number, since it is smaller than the sum of its proper divisors (1324107888).

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

680513808 is a wasteful number, since it uses less digits than its factorization.

680513808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64192 (or 64186 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 680513808 is about 26086.6595791795. The cubic root of 680513808 is about 879.5873616375.

The spelling of 680513808 in words is "six hundred eighty million, five hundred thirteen thousand, eight hundred eight".