3863639 has 8 divisors (see below), whose sum is σ = 4176480. Its totient is φ = 3553056.

The previous prime is 3863611. The next prime is 3863677. The reversal of 3863639 is 9363683.

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

It is a de Polignac number, because none of the positive numbers 2^k-3863639 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 (3863239) 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, 5369 + ... + 6045.

It is an arithmetic number, because the mean of its divisors is an integer number (522060).

Almost surely, 2^3863639 is an apocalyptic number.

3863639 is a deficient number, since it is larger than the sum of its proper divisors (312841).

3863639 is a wasteful number, since it uses less digits than its factorization.

3863639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129.

The product of its digits is 69984, while the sum is 38.

The square root of 3863639 is about 1965.6141533882. The cubic root of 3863639 is about 156.9153803131.

The spelling of 3863639 in words is "three million, eight hundred sixty-three thousand, six hundred thirty-nine".