3638241 has 6 divisors (see below), whose sum is σ = 5255250. Its totient is φ = 2425488.

The previous prime is 3638237. The next prime is 3638249. The reversal of 3638241 is 1428363.

3638241 = 354² + 355² + ... + 380².

It is a happy number.

3638241 is a `hidden beast` number, since 3 + 638 + 24 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 9216 = 1905^2 + 96^2 .

It is not a de Polignac number, because 3638241 - 2² = 3638237 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3638249) 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, 202116 + ... + 202133.

It is an arithmetic number, because the mean of its divisors is an integer number (875875).

Almost surely, 2^3638241 is an apocalyptic number.

It is an amenable number.

3638241 is a deficient number, since it is larger than the sum of its proper divisors (1617009).

3638241 is a wasteful number, since it uses less digits than its factorization.

3638241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404255 (or 404252 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 3638241 is about 1907.4173638719. The cubic root of 3638241 is about 153.8026510140.

The spelling of 3638241 in words is "three million, six hundred thirty-eight thousand, two hundred forty-one".