318404 has 6 divisors (see below), whose sum is σ = 557214. Its totient is φ = 159200.

The previous prime is 318403. The next prime is 318407. The reversal of 318404 is 404813.

318404 = T₃₉₇ + T₃₉₈ + ... + T₄₀₀.

It can be written as a sum of positive squares in only one way, i.e., 160000 + 158404 = 400^2 + 398^2 .

It is a super-2 number, since 2×318404² = 202762214432, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318404.

It is not an unprimeable number, because it can be changed into a prime (318403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39797 + ... + 39804.

It is an arithmetic number, because the mean of its divisors is an integer number (92869).

2³¹⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

318404 is a deficient number, since it is larger than the sum of its proper divisors (238810).

318404 is a wasteful number, since it uses less digits than its factorization.

318404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79605 (or 79603 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 318404 is about 564.2729835815. The cubic root of 318404 is about 68.2851348925.

The spelling of 318404 in words is "three hundred eighteen thousand, four hundred four".