2153660 has 24 divisors (see below), whose sum is σ = 4551120. Its totient is φ = 856064.

The previous prime is 2153647. The next prime is 2153693. The reversal of 2153660 is 663512.

2153660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4931 + ... + 5349.

It is an arithmetic number, because the mean of its divisors is an integer number (189630).

2^2153660 is an apocalyptic number.

2153660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2153660 is an abundant number, since it is smaller than the sum of its proper divisors (2397460).

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

2153660 is a wasteful number, since it uses less digits than its factorization.

2153660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2153660 is about 1467.5353488077. The cubic root of 2153660 is about 129.1394841632.

The spelling of 2153660 in words is "two million, one hundred fifty-three thousand, six hundred sixty".