640303224 has 32 divisors (see below), whose sum is σ = 1746282240. Its totient is φ = 194031200.

The previous prime is 640303207. The next prime is 640303253. The reversal of 640303224 is 422303046.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 640303194 and 640303203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212432 + ... + 1212959.

It is an arithmetic number, because the mean of its divisors is an integer number (54571320).

Almost surely, 2^640303224 is an apocalyptic number.

It is an amenable number.

640303224 is an abundant number, since it is smaller than the sum of its proper divisors (1105979016).

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

640303224 is a wasteful number, since it uses less digits than its factorization.

640303224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425411 (or 2425407 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 640303224 is about 25304.2135621718. The cubic root of 640303224 is about 861.9099537545.

The spelling of 640303224 in words is "six hundred forty million, three hundred three thousand, two hundred twenty-four".