2555904 has 68 divisors (see below), whose sum is σ = 7339976. Its totient is φ = 786432.

The previous prime is 2555897. The next prime is 2555911. The reversal of 2555904 is 4095552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2555897) and next prime (2555911).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196602 + ... + 196614.

2^2555904 is an apocalyptic number.

2555904 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 2555904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3669988).

2555904 is an abundant number, since it is smaller than the sum of its proper divisors (4784072).

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

2555904 is an frugal number, since it uses more digits than its factorization.

2555904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2555904 is about 1598.7194875900. The cubic root of 2555904 is about 136.7250778143.

The spelling of 2555904 in words is "two million, five hundred fifty-five thousand, nine hundred four".