673224818 has 18 divisors (see below), whose sum is σ = 1175156973. Its totient is φ = 288414840.

The previous prime is 673224817. The next prime is 673224857. The reversal of 673224818 is 818422376.

It can be written as a sum of positive squares in 2 ways, for example, as 593068609 + 80156209 = 24353^2 + 8953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18347.

It is a super-2 number, since 2×673224818² = 906463311142266248, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673224817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 255548 + ... + 258168.

Almost surely, 2^673224818 is an apocalyptic number.

673224818 is a deficient number, since it is larger than the sum of its proper divisors (501932155).

673224818 is an frugal number, since it uses more digits than its factorization.

673224818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258 (or 2630 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 673224818 is about 25946.5762288592. The cubic root of 673224818 is about 876.4356591492.

The spelling of 673224818 in words is "six hundred seventy-three million, two hundred twenty-four thousand, eight hundred eighteen".