28388285 has 8 divisors (see below), whose sum is σ = 34546176. Its totient is φ = 22390480.

The previous prime is 28388267. The next prime is 28388323. The reversal of 28388285 is 58288382.

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

It is not a de Polignac number, because 28388285 - 2⁸ = 28388029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39629 + ... + 40338.

It is an arithmetic number, because the mean of its divisors is an integer number (4318272).

Almost surely, 2^28388285 is an apocalyptic number.

It is an amenable number.

28388285 is a deficient number, since it is larger than the sum of its proper divisors (6157891).

28388285 is an equidigital number, since it uses as much as digits as its factorization.

28388285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80043.

The product of its digits is 245760, while the sum is 44.

The square root of 28388285 is about 5328.0657841284. The cubic root of 28388285 is about 305.0561036272.

The spelling of 28388285 in words is "twenty-eight million, three hundred eighty-eight thousand, two hundred eighty-five".