2778255 has 24 divisors (see below), whose sum is σ = 4869072. Its totient is φ = 1465344.

The previous prime is 2778241. The next prime is 2778257. The reversal of 2778255 is 5528772.

2778255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2778255 - 2¹⁰ = 2777231 is a prime.

It is a super-3 number, since 3×2778255³ = 64333557648584794125, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4527 + ... + 5103.

It is an arithmetic number, because the mean of its divisors is an integer number (202878).

2^2778255 is an apocalyptic number.

2778255 is a deficient number, since it is larger than the sum of its proper divisors (2090817).

2778255 is a wasteful number, since it uses less digits than its factorization.

2778255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 692 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2778255 is about 1666.8098271849. The cubic root of 2778255 is about 140.5801605189.

The spelling of 2778255 in words is "two million, seven hundred seventy-eight thousand, two hundred fifty-five".