2555784 has 96 divisors (see below), whose sum is σ = 8648640. Its totient is φ = 662400.

The previous prime is 2555779. The next prime is 2555809. The reversal of 2555784 is 4875552.

It is a happy number.

2555784 is a `hidden beast` number, since 25 + 557 + 84 = 666.

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 + 5³ + 5⁷ + 5⁹ + 7² + 8 + 4³ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5314 + ... + 5774.

It is an arithmetic number, because the mean of its divisors is an integer number (90090).

2^2555784 is an apocalyptic number.

2555784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2555784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4324320).

2555784 is an abundant number, since it is smaller than the sum of its proper divisors (6092856).

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

2555784 is a wasteful number, since it uses less digits than its factorization.

2555784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 484 counting only the distinct ones).

The product of its digits is 56000, while the sum is 36.

The square root of 2555784 is about 1598.6819571134. The cubic root of 2555784 is about 136.7229380279.

The spelling of 2555784 in words is "two million, five hundred fifty-five thousand, seven hundred eighty-four".