72788989 has 16 divisors (see below), whose sum is σ = 89985280. Its totient is φ = 57335040.

The previous prime is 72788977. The next prime is 72789011. The reversal of 72788989 is 98988727.

It is not a de Polignac number, because 72788989 - 2⁷ = 72788861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72788929) 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 15 ways as a sum of consecutive naturals, for example, 20272 + ... + 23590.

It is an arithmetic number, because the mean of its divisors is an integer number (5624080).

Almost surely, 2^72788989 is an apocalyptic number.

It is an amenable number.

72788989 is a deficient number, since it is larger than the sum of its proper divisors (17196291).

72788989 is a wasteful number, since it uses less digits than its factorization.

72788989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its digits is 4064256, while the sum is 58.

The square root of 72788989 is about 8531.6463241276. The cubic root of 72788989 is about 417.5308430965.

The spelling of 72788989 in words is "seventy-two million, seven hundred eighty-eight thousand, nine hundred eighty-nine".