2555778 has 16 divisors (see below), whose sum is σ = 5196096. Its totient is φ = 837840.

The previous prime is 2555767. The next prime is 2555779. The reversal of 2555778 is 8775552.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2555779) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3126 + ... + 3857.

It is an arithmetic number, because the mean of its divisors is an integer number (324756).

2^2555778 is an apocalyptic number.

2555778 is an abundant number, since it is smaller than the sum of its proper divisors (2640318).

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

2555778 is a wasteful number, since it uses less digits than its factorization.

2555778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049.

The product of its digits is 98000, while the sum is 39.

The square root of 2555778 is about 1598.6800805665. The cubic root of 2555778 is about 136.7228310368.

It can be divided in two parts, 2555 and 778, that added together give a palindrome (3333).

The spelling of 2555778 in words is "two million, five hundred fifty-five thousand, seven hundred seventy-eight".