3638838 has 24 divisors (see below), whose sum is σ = 8466552. Its totient is φ = 1039584.

The previous prime is 3638827. The next prime is 3638851. The reversal of 3638838 is 8388363.

It is a super-2 number, since 2×3638838² = 26482283980488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3638796 and 3638805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5895 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (352773).

Almost surely, 2^3638838 is an apocalyptic number.

3638838 is an abundant number, since it is smaller than the sum of its proper divisors (4827714).

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

3638838 is a wasteful number, since it uses less digits than its factorization.

3638838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12396 (or 12389 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 3638838 is about 1907.5738517814. The cubic root of 3638838 is about 153.8110630609.

The spelling of 3638838 in words is "three million, six hundred thirty-eight thousand, eight hundred thirty-eight".