318402 has 54 divisors (see below), whose sum is σ = 846963. Its totient is φ = 86184.

The previous prime is 318377. The next prime is 318403. The reversal of 318402 is 204813.

It is a happy number.

318402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159201 + 159201 = 399^2 + 399^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=399.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318402.

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 in 26 ways as a sum of consecutive naturals, for example, 16749 + ... + 16767.

2³¹⁸⁴⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318402

318402 is an abundant number, since it is smaller than the sum of its proper divisors (528561).

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

318402 is a wasteful number, since it uses less digits than its factorization.

318402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 318402 is about 564.2712113869. The cubic root of 318402 is about 68.2849919184.

Multiplying 318402 by its sum of digits (18), we get a square (5731236 = 2394²).

318402 divided by its sum of digits (18) gives a square (17689 = 133²).

The spelling of 318402 in words is "three hundred eighteen thousand, four hundred two".