640560030 has 32 divisors (see below), whose sum is σ = 1677103488. Its totient is φ = 155287200.

The previous prime is 640559993. The next prime is 640560047. The reversal of 640560030 is 30065046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970216 + ... + 970875.

It is an arithmetic number, because the mean of its divisors is an integer number (52409484).

Almost surely, 2^640560030 is an apocalyptic number.

640560030 is an abundant number, since it is smaller than the sum of its proper divisors (1036543458).

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

640560030 is a wasteful number, since it uses less digits than its factorization.

640560030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941112.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 640560030 is about 25309.2874257653. The cubic root of 640560030 is about 862.0251669089.

The spelling of 640560030 in words is "six hundred forty million, five hundred sixty thousand, thirty".