2153864 has 16 divisors (see below), whose sum is σ = 4067520. Its totient is φ = 1069200.

The previous prime is 2153861. The next prime is 2153873. The reversal of 2153864 is 4683512.

It is not an unprimeable number, because it can be changed into a prime (2153861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (254220).

2^2153864 is an apocalyptic number.

It is an amenable number.

2153864 is a deficient number, since it is larger than the sum of its proper divisors (1913656).

2153864 is a wasteful number, since it uses less digits than its factorization.

2153864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1936 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 2153864 is about 1467.6048514501. The cubic root of 2153864 is about 129.1435615049.

The spelling of 2153864 in words is "two million, one hundred fifty-three thousand, eight hundred sixty-four".