28365999 has 8 divisors (see below), whose sum is σ = 37944192. Its totient is φ = 18849240.

The previous prime is 28365989. The next prime is 28366033. The reversal of 28365999 is 99956382.

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

It is not a de Polignac number, because 28365999 - 2⁷ = 28365871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28365919) 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, 14269 + ... + 16134.

It is an arithmetic number, because the mean of its divisors is an integer number (4743024).

Almost surely, 2^28365999 is an apocalyptic number.

28365999 is a deficient number, since it is larger than the sum of its proper divisors (9578193).

28365999 is a wasteful number, since it uses less digits than its factorization.

28365999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30717.

The product of its digits is 1049760, while the sum is 51.

The square root of 28365999 is about 5325.9739954303. The cubic root of 28365999 is about 304.9762554300.

The spelling of 28365999 in words is "twenty-eight million, three hundred sixty-five thousand, nine hundred ninety-nine".