6443818 has 16 divisors (see below), whose sum is σ = 10233216. Its totient is φ = 3036880.

The previous prime is 6443797. The next prime is 6443837. The reversal of 6443818 is 8183446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2280 + ... + 4252.

It is an arithmetic number, because the mean of its divisors is an integer number (639576).

Almost surely, 2^6443818 is an apocalyptic number.

6443818 is a deficient number, since it is larger than the sum of its proper divisors (3789398).

6443818 is a wasteful number, since it uses less digits than its factorization.

6443818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069.

The product of its digits is 18432, while the sum is 34.

The square root of 6443818 is about 2538.4676480113. The cubic root of 6443818 is about 186.0863090403.

The spelling of 6443818 in words is "six million, four hundred forty-three thousand, eight hundred eighteen".