318842 has 4 divisors (see below), whose sum is σ = 478266. Its totient is φ = 159420.

The previous prime is 318841. The next prime is 318863. The reversal of 318842 is 248813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 229441 + 89401 = 479^2 + 299^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318842.

It is not an unprimeable number, because it can be changed into a prime (318841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79709 + ... + 79712.

2³¹⁸⁸⁴² is an apocalyptic number.

318842 is a deficient number, since it is larger than the sum of its proper divisors (159424).

318842 is a wasteful number, since it uses less digits than its factorization.

318842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159423.

The product of its digits is 1536, while the sum is 26.

The square root of 318842 is about 564.6609602230. The cubic root of 318842 is about 68.3164318038.

The spelling of 318842 in words is "three hundred eighteen thousand, eight hundred forty-two".