6390806 has 4 divisors (see below), whose sum is σ = 9586212. Its totient is φ = 3195402.

The previous prime is 6390799. The next prime is 6390829. The reversal of 6390806 is 6080936.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1597700 + ... + 1597703.

It is an arithmetic number, because the mean of its divisors is an integer number (2396553).

Almost surely, 2^6390806 is an apocalyptic number.

6390806 is a deficient number, since it is larger than the sum of its proper divisors (3195406).

6390806 is a wasteful number, since it uses less digits than its factorization.

6390806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195405.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6390806 is about 2528.0043512621. The cubic root of 6390806 is about 185.5746049715.

The spelling of 6390806 in words is "six million, three hundred ninety thousand, eight hundred six".