2255864 has 32 divisors (see below), whose sum is σ = 4620000. Its totient is φ = 1026432.

The previous prime is 2255837. The next prime is 2255867. The reversal of 2255864 is 4685522.

It is a self number, because there is not a number n which added to its sum of digits gives 2255864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2255867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11237 + ... + 11435.

It is an arithmetic number, because the mean of its divisors is an integer number (144375).

2^2255864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2255864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310000).

2255864 is an abundant number, since it is smaller than the sum of its proper divisors (2364136).

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

2255864 is a wasteful number, since it uses less digits than its factorization.

2255864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 323 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 2255864 is about 1501.9533947497. The cubic root of 2255864 is about 131.1508081993.

It can be divided in two parts, 22558 and 64, that added together give a palindrome (22622).

The spelling of 2255864 in words is "two million, two hundred fifty-five thousand, eight hundred sixty-four".