3638663 has 8 divisors (see below), whose sum is σ = 4403232. Its totient is φ = 2935296.

The previous prime is 3638653. The next prime is 3638699. The reversal of 3638663 is 3668363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3638663 - 2⁸ = 3638407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15170 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (550404).

Almost surely, 2^3638663 is an apocalyptic number.

3638663 is a deficient number, since it is larger than the sum of its proper divisors (764569).

3638663 is a wasteful number, since it uses less digits than its factorization.

3638663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30601.

The product of its digits is 46656, while the sum is 35.

The square root of 3638663 is about 1907.5279814461. The cubic root of 3638663 is about 153.8085973133.

The spelling of 3638663 in words is "three million, six hundred thirty-eight thousand, six hundred sixty-three".