319809138 has 16 divisors (see below), whose sum is σ = 697765536. Its totient is φ = 96911840.

The previous prime is 319809109. The next prime is 319809163. The reversal of 319809138 is 831908913.

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 319809138.

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, 2422731 + ... + 2422862.

It is an arithmetic number, because the mean of its divisors is an integer number (43610346).

Almost surely, 2^319809138 is an apocalyptic number.

319809138 is an abundant number, since it is smaller than the sum of its proper divisors (377956398).

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

319809138 is a wasteful number, since it uses less digits than its factorization.

319809138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4845609.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 319809138 is about 17883.2082692117. The cubic root of 319809138 is about 683.8543643633.

The spelling of 319809138 in words is "three hundred nineteen million, eight hundred nine thousand, one hundred thirty-eight".