3638859 has 16 divisors (see below), whose sum is σ = 5575680. Its totient is φ = 2067840.

The previous prime is 3638851. The next prime is 3638879. The reversal of 3638859 is 9588363.

It is not a de Polignac number, because 3638859 - 2³ = 3638851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3638859.

It is not an unprimeable number, because it can be changed into a prime (3638851) 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, 4702 + ... + 5420.

It is an arithmetic number, because the mean of its divisors is an integer number (348480).

Almost surely, 2^3638859 is an apocalyptic number.

3638859 is a deficient number, since it is larger than the sum of its proper divisors (1936821).

3638859 is a wasteful number, since it uses less digits than its factorization.

3638859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its digits is 155520, while the sum is 42.

The square root of 3638859 is about 1907.5793561475. The cubic root of 3638859 is about 153.8113589452.

The spelling of 3638859 in words is "three million, six hundred thirty-eight thousand, eight hundred fifty-nine".