8920644 has 24 divisors (see below), whose sum is σ = 20936160. Its totient is φ = 2956224.

The previous prime is 8920609. The next prime is 8920649. The reversal of 8920644 is 4460298.

It is not an unprimeable number, because it can be changed into a prime (8920649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72 + ... + 4224.

It is an arithmetic number, because the mean of its divisors is an integer number (872340).

Almost surely, 2^8920644 is an apocalyptic number.

It is an amenable number.

8920644 is an abundant number, since it is smaller than the sum of its proper divisors (12015516).

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

8920644 is a wasteful number, since it uses less digits than its factorization.

8920644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339 (or 4337 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 8920644 is about 2986.7447162421. The cubic root of 8920644 is about 207.3952168493.

The spelling of 8920644 in words is "eight million, nine hundred twenty thousand, six hundred forty-four".