8616640 has 28 divisors (see below), whose sum is σ = 20519136. Its totient is φ = 3446528.

The previous prime is 8616599. The next prime is 8616653. The reversal of 8616640 is 466168.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13144 + ... + 13783.

Almost surely, 2^8616640 is an apocalyptic number.

8616640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8616640 is an abundant number, since it is smaller than the sum of its proper divisors (11902496).

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

8616640 is a wasteful number, since it uses less digits than its factorization.

8616640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26944 (or 26934 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 8616640 is about 2935.4113851384. The cubic root of 8616640 is about 205.0120159524.

The spelling of 8616640 in words is "eight million, six hundred sixteen thousand, six hundred forty".