318920 has 64 divisors (see below), whose sum is σ = 881280. Its totient is φ = 101376.

The previous prime is 318919. The next prime is 318949. The reversal of 318920 is 29813.

It is a plaindrome in base 12.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4727 + ... + 4793.

It is an arithmetic number, because the mean of its divisors is an integer number (13770).

2³¹⁸⁹²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440640).

318920 is an abundant number, since it is smaller than the sum of its proper divisors (562360).

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

318920 is a wasteful number, since it uses less digits than its factorization.

318920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 318920 is about 564.7300239938. The cubic root of 318920 is about 68.3220022193.

The spelling of 318920 in words is "three hundred eighteen thousand, nine hundred twenty".