2257636 has 6 divisors (see below), whose sum is σ = 3950870. Its totient is φ = 1128816.

The previous prime is 2257609. The next prime is 2257639. The reversal of 2257636 is 6367522.

It can be written as a sum of positive squares in only one way, i.e., 2232036 + 25600 = 1494^2 + 160^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2257598 and 2257607.

It is not an unprimeable number, because it can be changed into a prime (2257639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282201 + ... + 282208.

2^2257636 is an apocalyptic number.

It is an amenable number.

2257636 is a deficient number, since it is larger than the sum of its proper divisors (1693234).

2257636 is a wasteful number, since it uses less digits than its factorization.

2257636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564413 (or 564411 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 2257636 is about 1502.5431774162. The cubic root of 2257636 is about 131.1851392300.

The spelling of 2257636 in words is "two million, two hundred fifty-seven thousand, six hundred thirty-six".