3638687 has 8 divisors (see below), whose sum is σ = 4045440. Its totient is φ = 3250080.

The previous prime is 3638653. The next prime is 3638699. The reversal of 3638687 is 7868363.

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

It is a cyclic number.

It is not a de Polignac number, because 3638687 - 2¹² = 3634591 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 (3638087) 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, 4112 + ... + 4917.

It is an arithmetic number, because the mean of its divisors is an integer number (505680).

Almost surely, 2^3638687 is an apocalyptic number.

3638687 is a deficient number, since it is larger than the sum of its proper divisors (406753).

3638687 is a wasteful number, since it uses less digits than its factorization.

3638687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073.

The product of its digits is 145152, while the sum is 41.

The square root of 3638687 is about 1907.5342723002. The cubic root of 3638687 is about 153.8089354777.

The spelling of 3638687 in words is "three million, six hundred thirty-eight thousand, six hundred eighty-seven".