319138220 has 12 divisors (see below), whose sum is σ = 670190304. Its totient is φ = 127655280.

The previous prime is 319138159. The next prime is 319138223. The reversal of 319138220 is 22831913.

It is not an unprimeable number, because it can be changed into a prime (319138223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7978436 + ... + 7978475.

It is an arithmetic number, because the mean of its divisors is an integer number (55849192).

Almost surely, 2^319138220 is an apocalyptic number.

It is an amenable number.

319138220 is an abundant number, since it is smaller than the sum of its proper divisors (351052084).

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

319138220 is a wasteful number, since it uses less digits than its factorization.

319138220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15956920 (or 15956918 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 319138220 is about 17864.4400975793. The cubic root of 319138220 is about 683.3758170427.

The spelling of 319138220 in words is "three hundred nineteen million, one hundred thirty-eight thousand, two hundred twenty".