6442718 has 4 divisors (see below), whose sum is σ = 9664080. Its totient is φ = 3221358.

The previous prime is 6442703. The next prime is 6442721. The reversal of 6442718 is 8172446.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610678 + ... + 1610681.

It is an arithmetic number, because the mean of its divisors is an integer number (2416020).

Almost surely, 2^6442718 is an apocalyptic number.

6442718 is a deficient number, since it is larger than the sum of its proper divisors (3221362).

6442718 is a wasteful number, since it uses less digits than its factorization.

6442718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221361.

The product of its digits is 10752, while the sum is 32.

The square root of 6442718 is about 2538.2509726187. The cubic root of 6442718 is about 186.0757197391.

The spelling of 6442718 in words is "six million, four hundred forty-two thousand, seven hundred eighteen".