2556620 has 24 divisors (see below), whose sum is σ = 5857488. Its totient is φ = 929600.

The previous prime is 2556607. The next prime is 2556641. The reversal of 2556620 is 266552.

It is a happy number.

2556620 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2556620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5591 + ... + 6030.

It is an arithmetic number, because the mean of its divisors is an integer number (244062).

2^2556620 is an apocalyptic number.

2556620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556620 is an abundant number, since it is smaller than the sum of its proper divisors (3300868).

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

2556620 is a wasteful number, since it uses less digits than its factorization.

2556620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11641 (or 11639 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2556620 is about 1598.9434011246. The cubic root of 2556620 is about 136.7378438149.

The spelling of 2556620 in words is "two million, five hundred fifty-six thousand, six hundred twenty".