2118864 has 40 divisors (see below), whose sum is σ = 5972832. Its totient is φ = 641920.

The previous prime is 2118841. The next prime is 2118871. The reversal of 2118864 is 4688112.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479 + ... + 2534.

2^2118864 is an apocalyptic number.

2118864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2118864 is an abundant number, since it is smaller than the sum of its proper divisors (3853968).

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

2118864 is a wasteful number, since it uses less digits than its factorization.

2118864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035 (or 4029 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 2118864 is about 1455.6318215813. The cubic root of 2118864 is about 128.4402160495.

The spelling of 2118864 in words is "two million, one hundred eighteen thousand, eight hundred sixty-four".