642202444 has 24 divisors (see below), whose sum is σ = 1221626448. Its totient is φ = 293628480.

The previous prime is 642202439. The next prime is 642202453. The reversal of 642202444 is 444202246.

642202444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52147 + ... + 63274.

It is an arithmetic number, because the mean of its divisors is an integer number (50901102).

Almost surely, 2^642202444 is an apocalyptic number.

It is an amenable number.

642202444 is a deficient number, since it is larger than the sum of its proper divisors (579424004).

642202444 is a wasteful number, since it uses less digits than its factorization.

642202444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115545 (or 115543 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 642202444 is about 25341.7135174400. The cubic root of 642202444 is about 862.7612904075.

The spelling of 642202444 in words is "six hundred forty-two million, two hundred two thousand, four hundred forty-four".