642806282 has 16 divisors (see below), whose sum is σ = 999637632. Its totient is φ = 309782880.

The previous prime is 642806267. The next prime is 642806317. The reversal of 642806282 is 282608246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40418 + ... + 54029.

It is an arithmetic number, because the mean of its divisors is an integer number (62477352).

Almost surely, 2^642806282 is an apocalyptic number.

642806282 is a deficient number, since it is larger than the sum of its proper divisors (356831350).

642806282 is a wasteful number, since it uses less digits than its factorization.

642806282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94573.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 642806282 is about 25353.6246323874. The cubic root of 642806282 is about 863.0316126712.

The spelling of 642806282 in words is "six hundred forty-two million, eight hundred six thousand, two hundred eighty-two".