6399746 has 8 divisors (see below), whose sum is σ = 9626880. Its totient is φ = 3190788.

The previous prime is 6399739. The next prime is 6399761. The reversal of 6399746 is 6479936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6399697 and 6399706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3626 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (1203360).

Almost surely, 2^6399746 is an apocalyptic number.

6399746 is a deficient number, since it is larger than the sum of its proper divisors (3227134).

6399746 is a wasteful number, since it uses less digits than its factorization.

6399746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088.

The product of its digits is 244944, while the sum is 44.

The square root of 6399746 is about 2529.7719264787. The cubic root of 6399746 is about 185.6610971379.

The spelling of 6399746 in words is "six million, three hundred ninety-nine thousand, seven hundred forty-six".