3638655 has 16 divisors (see below), whose sum is σ = 6468960. Its totient is φ = 1940544.

The previous prime is 3638653. The next prime is 3638699. The reversal of 3638655 is 5568363.

It is not a de Polignac number, because 3638655 - 2¹ = 3638653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638651) 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, 13342 + ... + 13611.

It is an arithmetic number, because the mean of its divisors is an integer number (404310).

Almost surely, 2^3638655 is an apocalyptic number.

3638655 is a deficient number, since it is larger than the sum of its proper divisors (2830305).

3638655 is a wasteful number, since it uses less digits than its factorization.

3638655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26967 (or 26961 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 3638655 is about 1907.5258844902. The cubic root of 3638655 is about 153.8084845915.

The spelling of 3638655 in words is "three million, six hundred thirty-eight thousand, six hundred fifty-five".