680862780 has 96 divisors (see below), whose sum is σ = 2281204800. Its totient is φ = 167595264.

The previous prime is 680862673. The next prime is 680862781. The reversal of 680862780 is 87268086.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680862781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41475 + ... + 55514.

It is an arithmetic number, because the mean of its divisors is an integer number (23762550).

Almost surely, 2^680862780 is an apocalyptic number.

680862780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

680862780 is an abundant number, since it is smaller than the sum of its proper divisors (1600342020).

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

680862780 is a wasteful number, since it uses less digits than its factorization.

680862780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97020 (or 97012 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 680862780 is about 26093.3474280323. The cubic root of 680862780 is about 879.7376886910.

The spelling of 680862780 in words is "six hundred eighty million, eight hundred sixty-two thousand, seven hundred eighty".