72838559 has 4 divisors (see below), whose sum is σ = 73716216. Its totient is φ = 71960904.

The previous prime is 72838547. The next prime is 72838573. The reversal of 72838559 is 95583827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72838559 - 2⁸ = 72838303 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 (72838529) 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 3 ways as a sum of consecutive naturals, for example, 438704 + ... + 438869.

It is an arithmetic number, because the mean of its divisors is an integer number (18429054).

Almost surely, 2^72838559 is an apocalyptic number.

72838559 is a deficient number, since it is larger than the sum of its proper divisors (877657).

72838559 is an equidigital number, since it uses as much as digits as its factorization.

72838559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877656.

The product of its digits is 604800, while the sum is 47.

The square root of 72838559 is about 8534.5508962101. The cubic root of 72838559 is about 417.6256024260.

The spelling of 72838559 in words is "seventy-two million, eight hundred thirty-eight thousand, five hundred fifty-nine".