319891212 has 36 divisors (see below), whose sum is σ = 825822816. Its totient is φ = 104361120.

The previous prime is 319891211. The next prime is 319891219. The reversal of 319891212 is 212198913.

319891212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (319891211) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 92839 + ... + 96222.

Almost surely, 2^319891212 is an apocalyptic number.

It is an amenable number.

319891212 is an abundant number, since it is smaller than the sum of its proper divisors (505931604).

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

319891212 is a wasteful number, since it uses less digits than its factorization.

319891212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189118 (or 189113 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 319891212 is about 17885.5028444827. The cubic root of 319891212 is about 683.9128595258.

The spelling of 319891212 in words is "three hundred nineteen million, eight hundred ninety-one thousand, two hundred twelve".