386641639 has 8 divisors (see below), whose sum is σ = 394899120. Its totient is φ = 378470016.

The previous prime is 386641631. The next prime is 386641643. The reversal of 386641639 is 936146683.

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 386641639 - 2³ = 386641631 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 (386641631) 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, 12322 + ... + 30415.

It is an arithmetic number, because the mean of its divisors is an integer number (49362390).

Almost surely, 2^386641639 is an apocalyptic number.

386641639 is a deficient number, since it is larger than the sum of its proper divisors (8257481).

386641639 is a wasteful number, since it uses less digits than its factorization.

386641639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42929.

The product of its digits is 559872, while the sum is 46.

The square root of 386641639 is about 19663.2052066798. The cubic root of 386641639 is about 728.5111577117.

The spelling of 386641639 in words is "three hundred eighty-six million, six hundred forty-one thousand, six hundred thirty-nine".