2153664 has 42 divisors (see below), whose sum is σ = 6174740. Its totient is φ = 717696.

The previous prime is 2153647. The next prime is 2153693. The reversal of 2153664 is 4663512.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1294 + ... + 2445.

2^2153664 is an apocalyptic number.

2153664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2153664 is an abundant number, since it is smaller than the sum of its proper divisors (4021076).

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

2153664 is a wasteful number, since it uses less digits than its factorization.

2153664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757 (or 3744 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2153664 is about 1467.5367116362. The cubic root of 2153664 is about 129.1395641135.

The spelling of 2153664 in words is "two million, one hundred fifty-three thousand, six hundred sixty-four".