6399862 has 16 divisors (see below), whose sum is σ = 11227392. Its totient is φ = 2678760.

The previous prime is 6399859. The next prime is 6399889. The reversal of 6399862 is 2689936.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4714 + ... + 5917.

It is an arithmetic number, because the mean of its divisors is an integer number (701712).

Almost surely, 2^6399862 is an apocalyptic number.

6399862 is a deficient number, since it is larger than the sum of its proper divisors (4827530).

6399862 is a wasteful number, since it uses less digits than its factorization.

6399862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10683.

The product of its digits is 139968, while the sum is 43.

The square root of 6399862 is about 2529.7948533429. The cubic root of 6399862 is about 185.6622188781.

It can be divided in two parts, 639 and 9862, that added together give a palindrome (10501).

The spelling of 6399862 in words is "six million, three hundred ninety-nine thousand, eight hundred sixty-two".