72843418 has 16 divisors (see below), whose sum is σ = 113805000. Its totient is φ = 34925632.

The previous prime is 72843413. The next prime is 72843437. The reversal of 72843418 is 81434827.

It can be written as a sum of positive squares in 4 ways, for example, as 36687249 + 36156169 = 6057^2 + 6013^2 .

It is not an unprimeable number, because it can be changed into a prime (72843413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4428 + ... + 12856.

Almost surely, 2^72843418 is an apocalyptic number.

72843418 is a deficient number, since it is larger than the sum of its proper divisors (40961582).

72843418 is a wasteful number, since it uses less digits than its factorization.

72843418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609.

The product of its digits is 43008, while the sum is 37.

The square root of 72843418 is about 8534.8355578769. The cubic root of 72843418 is about 417.6348887057.

The spelling of 72843418 in words is "seventy-two million, eight hundred forty-three thousand, four hundred eighteen".