642238102 has 16 divisors (see below), whose sum is σ = 1058500800. Its totient is φ = 289824840.

The previous prime is 642238049. The next prime is 642238169. The reversal of 642238102 is 201832246.

642238102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 101952 + ... + 108067.

It is an arithmetic number, because the mean of its divisors is an integer number (66156300).

Almost surely, 2^642238102 is an apocalyptic number.

642238102 is a deficient number, since it is larger than the sum of its proper divisors (416262698).

642238102 is a wasteful number, since it uses less digits than its factorization.

642238102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210171.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 642238102 is about 25342.4170512601. The cubic root of 642238102 is about 862.7772582553. Note that the first 3 decimals are identical.

The spelling of 642238102 in words is "six hundred forty-two million, two hundred thirty-eight thousand, one hundred two".