28766089 has 8 divisors (see below), whose sum is σ = 31593600. Its totient is φ = 25974000.

The previous prime is 28766069. The next prime is 28766093. The reversal of 28766089 is 98066782.

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 28766089 - 2¹¹ = 28764041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28766069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7137 + ... + 10414.

It is an arithmetic number, because the mean of its divisors is an integer number (3949200).

Almost surely, 2^28766089 is an apocalyptic number.

It is an amenable number.

28766089 is a deficient number, since it is larger than the sum of its proper divisors (2827511).

28766089 is a wasteful number, since it uses less digits than its factorization.

28766089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17711.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28766089 is about 5363.4027445270. The cubic root of 28766089 is about 306.4034186742.

The spelling of 28766089 in words is "twenty-eight million, seven hundred sixty-six thousand, eighty-nine".