6393861 has 24 divisors (see below), whose sum is σ = 9828000. Its totient is φ = 3994272.

The previous prime is 6393857. The next prime is 6393869. The reversal of 6393861 is 1683936.

It is a happy number.

It is not a de Polignac number, because 6393861 - 2² = 6393857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6393869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23635 + ... + 23903.

It is an arithmetic number, because the mean of its divisors is an integer number (409500).

Almost surely, 2^6393861 is an apocalyptic number.

It is an amenable number.

6393861 is a deficient number, since it is larger than the sum of its proper divisors (3434139).

6393861 is a wasteful number, since it uses less digits than its factorization.

6393861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 6393861 is about 2528.6085106240. The cubic root of 6393861 is about 185.6041703662.

The spelling of 6393861 in words is "six million, three hundred ninety-three thousand, eight hundred sixty-one".