2555856 has 30 divisors (see below), whose sum is σ = 7153250. Its totient is φ = 851904.

The previous prime is 2555837. The next prime is 2555863. The reversal of 2555856 is 6585552.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 968256 = 1260^2 + 984^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2¹⁹ + 5² + 5⁶ + 5⁶ + 8³ + 5⁹ + 6⁶ .

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2555856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8731 + ... + 9018.

2^2555856 is an apocalyptic number.

It is an amenable number.

2555856 is an abundant number, since it is smaller than the sum of its proper divisors (4597394).

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

2555856 is a wasteful number, since it uses less digits than its factorization.

2555856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17763 (or 17754 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 2555856 is about 1598.7044755051. The cubic root of 2555856 is about 136.7242219078.

The spelling of 2555856 in words is "two million, five hundred fifty-five thousand, eight hundred fifty-six".