642446422 has 12 divisors (see below), whose sum is σ = 1023691500. Its totient is φ = 302327456.

The previous prime is 642446417. The next prime is 642446437. The reversal of 642446422 is 224644246.

642446422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555172 + ... + 556327.

It is an arithmetic number, because the mean of its divisors is an integer number (85307625).

Almost surely, 2^642446422 is an apocalyptic number.

642446422 is a deficient number, since it is larger than the sum of its proper divisors (381245078).

642446422 is a wasteful number, since it uses less digits than its factorization.

642446422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111535 (or 1111518 counting only the distinct ones).

The product of its digits is 73728, while the sum is 34.

The square root of 642446422 is about 25346.5268232158. The cubic root of 642446422 is about 862.8705332823.

The spelling of 642446422 in words is "six hundred forty-two million, four hundred forty-six thousand, four hundred twenty-two".