6456638 has 8 divisors (see below), whose sum is σ = 9698832. Its totient is φ = 3223696.

The previous prime is 6456623. The next prime is 6456641. The reversal of 6456638 is 8366546.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170 + ... + 3597.

It is an arithmetic number, because the mean of its divisors is an integer number (1212354).

Almost surely, 2^6456638 is an apocalyptic number.

6456638 is a deficient number, since it is larger than the sum of its proper divisors (3242194).

6456638 is a wasteful number, since it uses less digits than its factorization.

6456638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626.

The product of its digits is 103680, while the sum is 38.

The square root of 6456638 is about 2540.9915387502. The cubic root of 6456638 is about 186.2096337606.

The spelling of 6456638 in words is "six million, four hundred fifty-six thousand, six hundred thirty-eight".