673443818 has 16 divisors (see below), whose sum is σ = 1071956160. Its totient is φ = 316621536.

The previous prime is 673443787. The next prime is 673443821. The reversal of 673443818 is 818344376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121355 + ... + 126782.

It is an arithmetic number, because the mean of its divisors is an integer number (66997260).

Almost surely, 2^673443818 is an apocalyptic number.

673443818 is a deficient number, since it is larger than the sum of its proper divisors (398512342).

673443818 is a wasteful number, since it uses less digits than its factorization.

673443818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248221.

The product of its digits is 387072, while the sum is 44.

The square root of 673443818 is about 25950.7960956885. The cubic root of 673443818 is about 876.5306836716.

The spelling of 673443818 in words is "six hundred seventy-three million, four hundred forty-three thousand, eight hundred eighteen".