2656140 has 24 divisors (see below), whose sum is σ = 7437360. Its totient is φ = 708288.

The previous prime is 2656117. The next prime is 2656141. The reversal of 2656140 is 416562.

It is a self number, because there is not a number n which added to its sum of digits gives 2656140.

It is not an unprimeable number, because it can be changed into a prime (2656141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22075 + ... + 22194.

It is an arithmetic number, because the mean of its divisors is an integer number (309890).

2^2656140 is an apocalyptic number.

2656140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656140 is an abundant number, since it is smaller than the sum of its proper divisors (4781220).

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

2656140 is a wasteful number, since it uses less digits than its factorization.

2656140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44281 (or 44279 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2656140 is about 1629.7668544918. The cubic root of 2656140 is about 138.4895446673.

The spelling of 2656140 in words is "two million, six hundred fifty-six thousand, one hundred forty".