319864842 has 64 divisors (see below), whose sum is σ = 788659200. Its totient is φ = 95275440.

The previous prime is 319864813. The next prime is 319864859. The reversal of 319864842 is 248468913.

Added to its reverse (248468913) it gives a triangular number (568333755 = T₃₃₇₁₄).

It is a happy number.

319864842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30483 + ... + 39609.

It is an arithmetic number, because the mean of its divisors is an integer number (12322800).

Almost surely, 2^319864842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 319864842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394329600).

319864842 is an abundant number, since it is smaller than the sum of its proper divisors (468794358).

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

319864842 is a wasteful number, since it uses less digits than its factorization.

319864842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208 (or 9202 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 319864842 is about 17884.7656400636. The cubic root of 319864842 is about 683.8940663892.

Adding to 319864842 its reverse (248468913), we get a triangular number (568333755 = T₃₃₇₁₄).

The spelling of 319864842 in words is "three hundred nineteen million, eight hundred sixty-four thousand, eight hundred forty-two".