6386641 has 16 divisors (see below), whose sum is σ = 7099200. Its totient is φ = 5721408.

The previous prime is 6386623. The next prime is 6386669. The reversal of 6386641 is 1466836.

It is a cyclic number.

It is not a de Polignac number, because 6386641 - 2¹⁵ = 6353873 is a prime.

It is an Ulam number.

Its product of digits (20736) is a multiple of the sum of its prime divisors (288).

It is a junction number, because it is equal to n+sod(n) for n = 6386597 and 6386606.

It is not an unprimeable number, because it can be changed into a prime (6386621) 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, 36831 + ... + 37003.

It is an arithmetic number, because the mean of its divisors is an integer number (443700).

Almost surely, 2^6386641 is an apocalyptic number.

It is an amenable number.

6386641 is a deficient number, since it is larger than the sum of its proper divisors (712559).

6386641 is a wasteful number, since it uses less digits than its factorization.

6386641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288.

The product of its digits is 20736, while the sum is 34.

The square root of 6386641 is about 2527.1804446853. The cubic root of 6386641 is about 185.5342821390.

The spelling of 6386641 in words is "six million, three hundred eighty-six thousand, six hundred forty-one".