642426200 has 48 divisors (see below), whose sum is σ = 1608542880. Its totient is φ = 237202560.

The previous prime is 642426151. The next prime is 642426203. The reversal of 642426200 is 2624246.

It is a super-2 number, since 2×642426200² = 825422844892880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 642426200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642426203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120944 + ... + 126143.

It is an arithmetic number, because the mean of its divisors is an integer number (33511310).

Almost surely, 2^642426200 is an apocalyptic number.

It is an amenable number.

642426200 is an abundant number, since it is smaller than the sum of its proper divisors (966116680).

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

642426200 is a wasteful number, since it uses less digits than its factorization.

642426200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247116 (or 247107 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 642426200 is about 25346.1279094066. The cubic root of 642426200 is about 862.8614797901.

The spelling of 642426200 in words is "six hundred forty-two million, four hundred twenty-six thousand, two hundred".