642426600 has 96 divisors (see below), whose sum is σ = 2108704320. Its totient is φ = 161233920.

The previous prime is 642426599. The next prime is 642426623. The reversal of 642426600 is 6624246.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21292 + ... + 41691.

It is an arithmetic number, because the mean of its divisors is an integer number (21965670).

Almost surely, 2^642426600 is an apocalyptic number.

642426600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642426600 is an abundant number, since it is smaller than the sum of its proper divisors (1466277720).

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

642426600 is a wasteful number, since it uses less digits than its factorization.

642426600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63019 (or 63010 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 642426600 is about 25346.1358001570. The cubic root of 642426600 is about 862.8616588739.

The spelling of 642426600 in words is "six hundred forty-two million, four hundred twenty-six thousand, six hundred".