3989638 has 16 divisors (see below), whose sum is σ = 6226560. Its totient is φ = 1915200.

The previous prime is 3989593. The next prime is 3989641. The reversal of 3989638 is 8369893.

It is a super-2 number, since 2×3989638² = 31834422742088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14058 + ... + 14338.

It is an arithmetic number, because the mean of its divisors is an integer number (389160).

Almost surely, 2^3989638 is an apocalyptic number.

3989638 is a deficient number, since it is larger than the sum of its proper divisors (2236922).

3989638 is a wasteful number, since it uses less digits than its factorization.

3989638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

The product of its digits is 279936, while the sum is 46.

The square root of 3989638 is about 1997.4078201509. The cubic root of 3989638 is about 158.6029145836.

The spelling of 3989638 in words is "three million, nine hundred eighty-nine thousand, six hundred thirty-eight".