2551428 has 72 divisors (see below), whose sum is σ = 7469280. Its totient is φ = 725760.

The previous prime is 2551421. The next prime is 2551429. The reversal of 2551428 is 8241552.

It is a happy number.

2551428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2551421) 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, 6543 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (103740).

2^2551428 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 2551428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3734640).

2551428 is an abundant number, since it is smaller than the sum of its proper divisors (4917852).

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

2551428 is a wasteful number, since it uses less digits than its factorization.

2551428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 412 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2551428 is about 1597.3190038311. The cubic root of 2551428 is about 136.6452183936.

The spelling of 2551428 in words is "two million, five hundred fifty-one thousand, four hundred twenty-eight".