319285391438 has 24 divisors (see below), whose sum is σ = 547892724792. Its totient is φ = 138694103424.

The previous prime is 319285391419. The next prime is 319285391459. The reversal of 319285391438 is 834193582913.

It is a super-2 number, since 2×319285391438² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21238520 + ... + 21253547.

It is an arithmetic number, because the mean of its divisors is an integer number (22828863533).

Almost surely, 2^319285391438 is an apocalyptic number.

319285391438 is a deficient number, since it is larger than the sum of its proper divisors (228607333354).

319285391438 is a wasteful number, since it uses less digits than its factorization.

319285391438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42492116 (or 42492099 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The spelling of 319285391438 in words is "three hundred nineteen billion, two hundred eighty-five million, three hundred ninety-one thousand, four hundred thirty-eight".