2556428 has 18 divisors (see below), whose sum is σ = 5204556. Its totient is φ = 1095528.

The previous prime is 2556419. The next prime is 2556451. The reversal of 2556428 is 8246552.

It is a junction number, because it is equal to n+sod(n) for n = 2556394 and 2556403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6326 + ... + 6717.

It is an arithmetic number, because the mean of its divisors is an integer number (289142).

2^2556428 is an apocalyptic number.

2556428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2556428 is an abundant number, since it is smaller than the sum of its proper divisors (2648128).

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

2556428 is a wasteful number, since it uses less digits than its factorization.

2556428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13061 (or 13052 counting only the distinct ones).

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

The square root of 2556428 is about 1598.8833603487. The cubic root of 2556428 is about 136.7344207637.

The spelling of 2556428 in words is "two million, five hundred fifty-six thousand, four hundred twenty-eight".