6390056 has 8 divisors (see below), whose sum is σ = 11981370. Its totient is φ = 3195024.

The previous prime is 6390053. The next prime is 6390107. The reversal of 6390056 is 6500936.

It can be written as a sum of positive squares in only one way, i.e., 5597956 + 792100 = 2366^2 + 890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6390053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399371 + ... + 399386.

Almost surely, 2^6390056 is an apocalyptic number.

It is an amenable number.

6390056 is a deficient number, since it is larger than the sum of its proper divisors (5591314).

6390056 is a wasteful number, since it uses less digits than its factorization.

6390056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798763 (or 798759 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 6390056 is about 2527.8560085574. The cubic root of 6390056 is about 185.5673452508.

The spelling of 6390056 in words is "six million, three hundred ninety thousand, fifty-six".