2257638 has 16 divisors (see below), whose sum is σ = 4549440. Its totient is φ = 746856.

The previous prime is 2257609. The next prime is 2257639. The reversal of 2257638 is 8367522.

2257638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2257599 and 2257608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257639) 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 7 ways as a sum of consecutive naturals, for example, 520 + ... + 2187.

It is an arithmetic number, because the mean of its divisors is an integer number (284340).

2^2257638 is an apocalyptic number.

2257638 is an abundant number, since it is smaller than the sum of its proper divisors (2291802).

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

2257638 is a wasteful number, since it uses less digits than its factorization.

2257638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its digits is 20160, while the sum is 33.

The square root of 2257638 is about 1502.5438429543. The cubic root of 2257638 is about 131.1851779682.

The spelling of 2257638 in words is "two million, two hundred fifty-seven thousand, six hundred thirty-eight".