3879639 has 12 divisors (see below), whose sum is σ = 5621616. Its totient is φ = 2578272.

The previous prime is 3879607. The next prime is 3879641. The reversal of 3879639 is 9369783.

It is a happy number.

3879639 is a `hidden beast` number, since 3 + 8 + 7 + 9 + 639 = 666.

It is not a de Polignac number, because 3879639 - 2⁵ = 3879607 is a prime.

3879639 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3879594 and 3879603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3879679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4099 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (468468).

Almost surely, 2^3879639 is an apocalyptic number.

3879639 is a deficient number, since it is larger than the sum of its proper divisors (1741977).

3879639 is a wasteful number, since it uses less digits than its factorization.

3879639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1363 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3879639 is about 1969.6799232363. The cubic root of 3879639 is about 157.1316866125.

The spelling of 3879639 in words is "three million, eight hundred seventy-nine thousand, six hundred thirty-nine".