673722618 has 32 divisors (see below), whose sum is σ = 1364705664. Its totient is φ = 221709312.

The previous prime is 673722617. The next prime is 673722641. The reversal of 673722618 is 816227376.

It is a self number, because there is not a number n which added to its sum of digits gives 673722618.

It is not an unprimeable number, because it can be changed into a prime (673722617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282246 + ... + 284622.

It is an arithmetic number, because the mean of its divisors is an integer number (42647052).

Almost surely, 2^673722618 is an apocalyptic number.

673722618 is an abundant number, since it is smaller than the sum of its proper divisors (690983046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673722618 is a wasteful number, since it uses less digits than its factorization.

673722618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966.

The product of its digits is 169344, while the sum is 42.

The square root of 673722618 is about 25956.1672440289. The cubic root of 673722618 is about 876.6516257273.

The spelling of 673722618 in words is "six hundred seventy-three million, seven hundred twenty-two thousand, six hundred eighteen".