6399286 has 4 divisors (see below), whose sum is σ = 9598932. Its totient is φ = 3199642.

The previous prime is 6399277. The next prime is 6399311. The reversal of 6399286 is 6829936.

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

It is a super-2 number, since 2×6399286² = 81901722619592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599820 + ... + 1599823.

It is an arithmetic number, because the mean of its divisors is an integer number (2399733).

Almost surely, 2^6399286 is an apocalyptic number.

6399286 is a deficient number, since it is larger than the sum of its proper divisors (3199646).

6399286 is a wasteful number, since it uses less digits than its factorization.

6399286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199645.

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

The square root of 6399286 is about 2529.6810075581. The cubic root of 6399286 is about 185.6566487243.

The spelling of 6399286 in words is "six million, three hundred ninety-nine thousand, two hundred eighty-six".