640314356 has 24 divisors (see below), whose sum is σ = 1223171040. Its totient is φ = 290872800.

The previous prime is 640314329. The next prime is 640314361. The reversal of 640314356 is 653413046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90350 + ... + 97178.

It is an arithmetic number, because the mean of its divisors is an integer number (50965460).

Almost surely, 2^640314356 is an apocalyptic number.

It is an amenable number.

640314356 is a deficient number, since it is larger than the sum of its proper divisors (582856684).

640314356 is a wasteful number, since it uses less digits than its factorization.

640314356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8975 (or 8973 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 640314356 is about 25304.4335245822. The cubic root of 640314356 is about 861.9149486411.

The spelling of 640314356 in words is "six hundred forty million, three hundred fourteen thousand, three hundred fifty-six".