3638256 has 20 divisors (see below), whose sum is σ = 9398952. Its totient is φ = 1212736.

The previous prime is 3638251. The next prime is 3638267. The reversal of 3638256 is 6528363.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37851 + ... + 37946.

Almost surely, 2^3638256 is an apocalyptic number.

It is an amenable number.

3638256 is an abundant number, since it is smaller than the sum of its proper divisors (5760696).

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

3638256 is a wasteful number, since it uses less digits than its factorization.

3638256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75808 (or 75802 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 3638256 is about 1907.4212958862. The cubic root of 3638256 is about 153.8028623833.

The spelling of 3638256 in words is "three million, six hundred thirty-eight thousand, two hundred fifty-six".