6395990 has 8 divisors (see below), whose sum is σ = 11512800. Its totient is φ = 2558392.

The previous prime is 6395981. The next prime is 6396053. The reversal of 6395990 is 995936.

It is a happy number.

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

It is a Curzon number.

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, 319790 + ... + 319809.

It is an arithmetic number, because the mean of its divisors is an integer number (1439100).

Almost surely, 2^6395990 is an apocalyptic number.

6395990 is a deficient number, since it is larger than the sum of its proper divisors (5116810).

6395990 is a wasteful number, since it uses less digits than its factorization.

6395990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639606.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 6395990 is about 2529.0294581123. The cubic root of 6395990 is about 185.6247686363.

The spelling of 6395990 in words is "six million, three hundred ninety-five thousand, nine hundred ninety".