3638228 has 18 divisors (see below), whose sum is σ = 6999258. Its totient is φ = 1653520.

The previous prime is 3638227. The next prime is 3638233. The reversal of 3638228 is 8228363.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3579664 + 58564 = 1892^2 + 242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3638194 and 3638203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3275 + ... + 4242.

Almost surely, 2^3638228 is an apocalyptic number.

It is an amenable number.

3638228 is a deficient number, since it is larger than the sum of its proper divisors (3361030).

3638228 is a wasteful number, since it uses less digits than its factorization.

3638228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543 (or 7530 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 3638228 is about 1907.4139561196. The cubic root of 3638228 is about 153.8024678269.

The spelling of 3638228 in words is "three million, six hundred thirty-eight thousand, two hundred twenty-eight".