642113800 has 48 divisors (see below), whose sum is σ = 1580741460. Its totient is φ = 241735680.

The previous prime is 642113777. The next prime is 642113867. The reversal of 642113800 is 8311246.

It can be written as a sum of positive squares in 6 ways, for example, as 304362916 + 337750884 = 17446^2 + 18378^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91029 + ... + 97828.

Almost surely, 2^642113800 is an apocalyptic number.

It is an amenable number.

642113800 is an abundant number, since it is smaller than the sum of its proper divisors (938627660).

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

642113800 is a wasteful number, since it uses less digits than its factorization.

642113800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188890 (or 188881 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 642113800 is about 25339.9644830059. The cubic root of 642113800 is about 862.7215925772.

The spelling of 642113800 in words is "six hundred forty-two million, one hundred thirteen thousand, eight hundred".