6423656 has 16 divisors (see below), whose sum is σ = 12134340. Its totient is φ = 3187840.

The previous prime is 6423649. The next prime is 6423661. The reversal of 6423656 is 6563246.

It can be written as a sum of positive squares in 2 ways, for example, as 6421156 + 2500 = 2534^2 + 50^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1835 + ... + 4026.

Almost surely, 2^6423656 is an apocalyptic number.

It is an amenable number.

6423656 is a deficient number, since it is larger than the sum of its proper divisors (5710684).

6423656 is a wasteful number, since it uses less digits than its factorization.

6423656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004 (or 6000 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 6423656 is about 2534.4932432342. The cubic root of 6423656 is about 185.8920250488.

The spelling of 6423656 in words is "six million, four hundred twenty-three thousand, six hundred fifty-six".