8720680 has 32 divisors (see below), whose sum is σ = 20476800. Its totient is φ = 3336256.

The previous prime is 8720671. The next prime is 8720681. The reversal of 8720680 is 860278.

It is not an unprimeable number, because it can be changed into a prime (8720681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820 + ... + 5659.

It is an arithmetic number, because the mean of its divisors is an integer number (639900).

Almost surely, 2^8720680 is an apocalyptic number.

It is an amenable number.

8720680 is an abundant number, since it is smaller than the sum of its proper divisors (11756120).

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

8720680 is a wasteful number, since it uses less digits than its factorization.

8720680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9513 (or 9509 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8720680 is about 2953.0797483305. The cubic root of 8720680 is about 205.8338434572.

The spelling of 8720680 in words is "eight million, seven hundred twenty thousand, six hundred eighty".