8720008 has 32 divisors (see below), whose sum is σ = 17962560. Its totient is φ = 3935680.

The previous prime is 8719999. The next prime is 8720027. The reversal of 8720008 is 8000278.

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, 17085 + ... + 17587.

It is an arithmetic number, because the mean of its divisors is an integer number (561330).

Almost surely, 2^8720008 is an apocalyptic number.

8720008 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8720008 is an abundant number, since it is smaller than the sum of its proper divisors (9242552).

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

8720008 is a wasteful number, since it uses less digits than its factorization.

8720008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 8720008 is about 2952.9659666173. The cubic root of 8720008 is about 205.8285562588.

The spelling of 8720008 in words is "eight million, seven hundred twenty thousand, eight".