2556774 has 48 divisors (see below), whose sum is σ = 6224400. Its totient is φ = 751680.

The previous prime is 2556761. The next prime is 2556791. The reversal of 2556774 is 4776552.

2556774 is a `hidden beast` number, since 25 + 567 + 74 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7152 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (129675).

2^2556774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3112200).

2556774 is an abundant number, since it is smaller than the sum of its proper divisors (3667626).

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

2556774 is a wasteful number, since it uses less digits than its factorization.

2556774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 402 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 2556774 is about 1598.9915572010. The cubic root of 2556774 is about 136.7405892633.

The spelling of 2556774 in words is "two million, five hundred fifty-six thousand, seven hundred seventy-four".