3638994 has 32 divisors (see below), whose sum is σ = 7750080. Its totient is φ = 1135872.

The previous prime is 3638993. The next prime is 3639017. The reversal of 3638994 is 4998363.

It is not an unprimeable number, because it can be changed into a prime (3638993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15502 + ... + 15734.

It is an arithmetic number, because the mean of its divisors is an integer number (242190).

Almost surely, 2^3638994 is an apocalyptic number.

3638994 is an abundant number, since it is smaller than the sum of its proper divisors (4111086).

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

3638994 is a wasteful number, since it uses less digits than its factorization.

3638994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its digits is 139968, while the sum is 42.

The square root of 3638994 is about 1907.6147409789. The cubic root of 3638994 is about 153.8132610320.

The spelling of 3638994 in words is "three million, six hundred thirty-eight thousand, nine hundred ninety-four".