642341900 has 36 divisors (see below), whose sum is σ = 1400071848. Its totient is φ = 255795840.

The previous prime is 642341893. The next prime is 642341929. The reversal of 642341900 is 9143246.

It is a super-2 number, since 2×642341900² = 825206232991220000, which contains 22 as substring.

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, 8552 + ... + 36848.

Almost surely, 2^642341900 is an apocalyptic number.

It is an amenable number.

642341900 is an abundant number, since it is smaller than the sum of its proper divisors (757729948).

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

642341900 is a wasteful number, since it uses less digits than its factorization.

642341900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28538 (or 28531 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 642341900 is about 25344.4648789435. The cubic root of 642341900 is about 862.8237362046.

The spelling of 642341900 in words is "six hundred forty-two million, three hundred forty-one thousand, nine hundred".