318839445 has 24 divisors (see below), whose sum is σ = 553073976. Its totient is φ = 169918848.

The previous prime is 318839441. The next prime is 318839473. The reversal of 318839445 is 544938813.

It can be written as a sum of positive squares in 4 ways, for example, as 56205009 + 262634436 = 7497^2 + 16206^2 .

It is not a de Polignac number, because 318839445 - 2² = 318839441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 318839445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318839441) 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 23 ways as a sum of consecutive naturals, for example, 103467 + ... + 106503.

It is an arithmetic number, because the mean of its divisors is an integer number (23044749).

Almost surely, 2^318839445 is an apocalyptic number.

It is an amenable number.

318839445 is a deficient number, since it is larger than the sum of its proper divisors (234234531).

318839445 is a wasteful number, since it uses less digits than its factorization.

318839445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381 (or 5378 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 318839445 is about 17856.0758566937. The cubic root of 318839445 is about 683.1624932162.

It can be divided in two parts, 31883 and 9445, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 318839445 in words is "three hundred eighteen million, eight hundred thirty-nine thousand, four hundred forty-five".