28399585 has 8 divisors (see below), whose sum is σ = 35873280. Its totient is φ = 21523824.

The previous prime is 28399559. The next prime is 28399589. The reversal of 28399585 is 58599382.

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 28399585 - 2⁹ = 28399073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28399589) 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, 149377 + ... + 149566.

It is an arithmetic number, because the mean of its divisors is an integer number (4484160).

Almost surely, 2^28399585 is an apocalyptic number.

It is an amenable number.

28399585 is a deficient number, since it is larger than the sum of its proper divisors (7473695).

28399585 is a wasteful number, since it uses less digits than its factorization.

28399585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298967.

The product of its digits is 777600, while the sum is 49.

The square root of 28399585 is about 5329.1261009663. The cubic root of 28399585 is about 305.0965742731.

The spelling of 28399585 in words is "twenty-eight million, three hundred ninety-nine thousand, five hundred eighty-five".