642842336 has 12 divisors (see below), whose sum is σ = 1265595912. Its totient is φ = 321421152.

The previous prime is 642842327. The next prime is 642842351. The reversal of 642842336 is 633248246.

642842336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642842336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10044380 + ... + 10044443.

It is an arithmetic number, because the mean of its divisors is an integer number (105466326).

Almost surely, 2^642842336 is an apocalyptic number.

It is an amenable number.

642842336 is a deficient number, since it is larger than the sum of its proper divisors (622753576).

642842336 is a wasteful number, since it uses less digits than its factorization.

642842336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20088833 (or 20088825 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 642842336 is about 25354.3356450135. The cubic root of 642842336 is about 863.0477477345.

The spelling of 642842336 in words is "six hundred forty-two million, eight hundred forty-two thousand, three hundred thirty-six".