6399886 has 4 divisors (see below), whose sum is σ = 9599832. Its totient is φ = 3199942.

The previous prime is 6399859. The next prime is 6399889. The reversal of 6399886 is 6889936.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599970 + ... + 1599973.

It is an arithmetic number, because the mean of its divisors is an integer number (2399958).

Almost surely, 2^6399886 is an apocalyptic number.

6399886 is a deficient number, since it is larger than the sum of its proper divisors (3199946).

6399886 is a wasteful number, since it uses less digits than its factorization.

6399886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199945.

The product of its digits is 559872, while the sum is 49.

The square root of 6399886 is about 2529.7995968060. The cubic root of 6399886 is about 185.6624509606.

The spelling of 6399886 in words is "six million, three hundred ninety-nine thousand, eight hundred eighty-six".