5644640 has 24 divisors (see below), whose sum is σ = 13335840. Its totient is φ = 2257792.

The previous prime is 5644627. The next prime is 5644643. The reversal of 5644640 is 464465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17480 + ... + 17799.

It is an arithmetic number, because the mean of its divisors is an integer number (555660).

Almost surely, 2^5644640 is an apocalyptic number.

It is an amenable number.

5644640 is an abundant number, since it is smaller than the sum of its proper divisors (7691200).

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

5644640 is a wasteful number, since it uses less digits than its factorization.

5644640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35294 (or 35286 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 5644640 is about 2375.8451127967. The cubic root of 5644640 is about 178.0514096340.

The spelling of 5644640 in words is "five million, six hundred forty-four thousand, six hundred forty".