673815218 has 16 divisors (see below), whose sum is σ = 1034328960. Its totient is φ = 329068176.

The previous prime is 673815217. The next prime is 673815257. The reversal of 673815218 is 812518376.

It is not an unprimeable number, because it can be changed into a prime (673815217) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 40805 + ... + 54887.

It is an arithmetic number, because the mean of its divisors is an integer number (64645560).

Almost surely, 2^673815218 is an apocalyptic number.

673815218 is a deficient number, since it is larger than the sum of its proper divisors (360513742).

673815218 is a wasteful number, since it uses less digits than its factorization.

673815218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14641.

The product of its digits is 80640, while the sum is 41.

The square root of 673815218 is about 25957.9509591955. The cubic root of 673815218 is about 876.6917877660.

The spelling of 673815218 in words is "six hundred seventy-three million, eight hundred fifteen thousand, two hundred eighteen".