6446918 has 4 divisors (see below), whose sum is σ = 9670380. Its totient is φ = 3223458.

The previous prime is 6446863. The next prime is 6446929. The reversal of 6446918 is 8196446.

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, 1611728 + ... + 1611731.

It is an arithmetic number, because the mean of its divisors is an integer number (2417595).

Almost surely, 2^6446918 is an apocalyptic number.

6446918 is a deficient number, since it is larger than the sum of its proper divisors (3223462).

6446918 is a wasteful number, since it uses less digits than its factorization.

6446918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223461.

The product of its digits is 41472, while the sum is 38.

The square root of 6446918 is about 2539.0781791824. The cubic root of 6446918 is about 186.1161451342.

The spelling of 6446918 in words is "six million, four hundred forty-six thousand, nine hundred eighteen".