3638394 has 24 divisors (see below), whose sum is σ = 7948512. Its totient is φ = 1202760.

The previous prime is 3638351. The next prime is 3638407. The reversal of 3638394 is 4938363.

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, 1587 + ... + 3129.

It is an arithmetic number, because the mean of its divisors is an integer number (331188).

Almost surely, 2^3638394 is an apocalyptic number.

3638394 is an abundant number, since it is smaller than the sum of its proper divisors (4310118).

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

3638394 is a wasteful number, since it uses less digits than its factorization.

3638394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682 (or 1679 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 3638394 is about 1907.4574700370. The cubic root of 3638394 is about 153.8048069529.

The spelling of 3638394 in words is "three million, six hundred thirty-eight thousand, three hundred ninety-four".