2556396 has 18 divisors (see below), whose sum is σ = 6462092. Its totient is φ = 852120.

The previous prime is 2556373. The next prime is 2556397. The reversal of 2556396 is 6936552.

2556396 is a `hidden beast` number, since 2 + 5 + 563 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 71011 = 2556396 / (2 + 5 + 5 + 6 + 3 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 2556396.

It is not an unprimeable number, because it can be changed into a prime (2556397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35470 + ... + 35541.

2^2556396 is an apocalyptic number.

It is an amenable number.

2556396 is an abundant number, since it is smaller than the sum of its proper divisors (3905696).

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

2556396 is a wasteful number, since it uses less digits than its factorization.

2556396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71021 (or 71016 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 2556396 is about 1598.8733533335. The cubic root of 2556396 is about 136.7338502386.

Adding to 2556396 its product of digits (48600), we get a square (2604996 = 1614²).

The spelling of 2556396 in words is "two million, five hundred fifty-six thousand, three hundred ninety-six".