618885 has 24 divisors (see below), whose sum is σ = 1137240. Its totient is φ = 310272.

The previous prime is 618883. The next prime is 618913. The reversal of 618885 is 588816.

It can be written as a sum of positive squares in 4 ways, for example, as 248004 + 370881 = 498^2 + 609^2 .

It is not a de Polignac number, because 618885 - 2¹ = 618883 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (47385).

2⁶¹⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

618885 is a deficient number, since it is larger than the sum of its proper divisors (518355).

618885 is a wasteful number, since it uses less digits than its factorization.

618885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 834 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 618885 is about 786.6924430805. The cubic root of 618885 is about 85.2190428902.

The spelling of 618885 in words is "six hundred eighteen thousand, eight hundred eighty-five".