6399494 has 16 divisors (see below), whose sum is σ = 9847440. Its totient is φ = 3118080.

The previous prime is 6399467. The next prime is 6399509. The reversal of 6399494 is 4949936.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22634 + ... + 22914.

It is an arithmetic number, because the mean of its divisors is an integer number (615465).

Almost surely, 2^6399494 is an apocalyptic number.

6399494 is a deficient number, since it is larger than the sum of its proper divisors (3447946).

6399494 is a wasteful number, since it uses less digits than its factorization.

6399494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 209952, while the sum is 44.

The square root of 6399494 is about 2529.7221191269. The cubic root of 6399494 is about 185.6586602073.

The spelling of 6399494 in words is "six million, three hundred ninety-nine thousand, four hundred ninety-four".