313438818 has 64 divisors (see below), whose sum is σ = 783820800. Its totient is φ = 81177600.

The previous prime is 313438777. The next prime is 313438837. The reversal of 313438818 is 818834313.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 206683 + ... + 208193.

It is an arithmetic number, because the mean of its divisors is an integer number (12247200).

Almost surely, 2^313438818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 313438818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391910400).

313438818 is an abundant number, since it is smaller than the sum of its proper divisors (470381982).

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

313438818 is a wasteful number, since it uses less digits than its factorization.

313438818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983.

The product of its digits is 55296, while the sum is 39.

The square root of 313438818 is about 17704.2033991931. The cubic root of 313438818 is about 679.2832831999.

The spelling of 313438818 in words is "three hundred thirteen million, four hundred thirty-eight thousand, eight hundred eighteen".