72544189 has 8 divisors (see below), whose sum is σ = 74024280. Its totient is φ = 71073600.

The previous prime is 72544127. The next prime is 72544201. The reversal of 72544189 is 98144527.

It can be written as a sum of positive squares in 4 ways, for example, as 4900 + 72539289 = 70^2 + 8517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72544189 - 2¹⁹ = 72019901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72544789) by changing a digit.

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, 14199 + ... + 18619.

It is an arithmetic number, because the mean of its divisors is an integer number (9253035).

Almost surely, 2^72544189 is an apocalyptic number.

It is an amenable number.

72544189 is a deficient number, since it is larger than the sum of its proper divisors (1480091).

72544189 is a wasteful number, since it uses less digits than its factorization.

72544189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751.

The product of its digits is 80640, while the sum is 40.

The square root of 72544189 is about 8517.2876551165. The cubic root of 72544189 is about 417.0622449816.

The spelling of 72544189 in words is "seventy-two million, five hundred forty-four thousand, one hundred eighty-nine".