318861 has 12 divisors (see below), whose sum is σ = 468000. Its totient is φ = 209160.

The previous prime is 318841. The next prime is 318863. The reversal of 318861 is 168813.

It is not a de Polignac number, because 318861 - 2⁹ = 318349 is a prime.

It is an Ulam number.

Its product of digits (1152) is a multiple of the sum of its prime factors (576).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318861.

It is not an unprimeable number, because it can be changed into a prime (318863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (39000).

2³¹⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

318861 is a deficient number, since it is larger than the sum of its proper divisors (149139).

318861 is a wasteful number, since it uses less digits than its factorization.

318861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 318861 is about 564.6777842274. The cubic root of 318861 is about 68.3177887836.

It can be divided in two parts, 3188 and 61, that added together give a square (3249 = 57²).

The spelling of 318861 in words is "three hundred eighteen thousand, eight hundred sixty-one".