642508900 has 36 divisors (see below), whose sum is σ = 1520996400. Its totient is φ = 233639200.

The previous prime is 642508873. The next prime is 642508939. The reversal of 642508900 is 9805246.

It is a happy 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, 290950 + ... + 293149.

It is an arithmetic number, because the mean of its divisors is an integer number (42249900).

Almost surely, 2^642508900 is an apocalyptic number.

It is an amenable number.

642508900 is an abundant number, since it is smaller than the sum of its proper divisors (878487500).

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

642508900 is a wasteful number, since it uses less digits than its factorization.

642508900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584124 (or 584117 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 642508900 is about 25347.7592698053. The cubic root of 642508900 is about 862.8985038003.

The spelling of 642508900 in words is "six hundred forty-two million, five hundred eight thousand, nine hundred".