319840638 has 16 divisors (see below), whose sum is σ = 688887696. Its totient is φ = 98412480.

The previous prime is 319840597. The next prime is 319840643. The reversal of 319840638 is 836048913.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 319840638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050183 + ... + 2050338.

It is an arithmetic number, because the mean of its divisors is an integer number (43055481).

Almost surely, 2^319840638 is an apocalyptic number.

319840638 is an abundant number, since it is smaller than the sum of its proper divisors (369047058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

319840638 is a wasteful number, since it uses less digits than its factorization.

319840638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100539.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 319840638 is about 17884.0889619796. The cubic root of 319840638 is about 683.8768159891.

The spelling of 319840638 in words is "three hundred nineteen million, eight hundred forty thousand, six hundred thirty-eight".