640223224 has 16 divisors (see below), whose sum is σ = 1207609200. Its totient is φ = 318194112.

The previous prime is 640223209. The next prime is 640223231. The reversal of 640223224 is 422322046.

It is a congruent number.

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, 238269 + ... + 240940.

It is an arithmetic number, because the mean of its divisors is an integer number (75475575).

Almost surely, 2^640223224 is an apocalyptic number.

It is an amenable number.

640223224 is a deficient number, since it is larger than the sum of its proper divisors (567385976).

640223224 is a wasteful number, since it uses less digits than its factorization.

640223224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479382 (or 479378 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 640223224 is about 25302.6327483920. The cubic root of 640223224 is about 861.8740563517.

The spelling of 640223224 in words is "six hundred forty million, two hundred twenty-three thousand, two hundred twenty-four".