2556920 has 32 divisors (see below), whose sum is σ = 5821200. Its totient is φ = 1010688.

The previous prime is 2556913. The next prime is 2556943. The reversal of 2556920 is 296552.

2556920 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, 3551 + ... + 4209.

2^2556920 is an apocalyptic number.

2556920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556920 is an abundant number, since it is smaller than the sum of its proper divisors (3264280).

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

2556920 is a wasteful number, since it uses less digits than its factorization.

2556920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2556920 is about 1599.0372103238. The cubic root of 2556920 is about 136.7431919893.

The spelling of 2556920 in words is "two million, five hundred fifty-six thousand, nine hundred twenty".