640290200 has 48 divisors (see below), whose sum is σ = 1624014360. Its totient is φ = 232832000.

The previous prime is 640290199. The next prime is 640290229. The reversal of 640290200 is 2092046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143321 + ... + 147720.

Almost surely, 2^640290200 is an apocalyptic number.

It is an amenable number.

640290200 is an abundant number, since it is smaller than the sum of its proper divisors (983724160).

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

640290200 is a wasteful number, since it uses less digits than its factorization.

640290200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291068 (or 291059 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 640290200 is about 25303.9562124186. The cubic root of 640290200 is about 861.9041098611.

The spelling of 640290200 in words is "six hundred forty million, two hundred ninety thousand, two hundred".