28382885 has 8 divisors (see below), whose sum is σ = 34980216. Its totient is φ = 22092480.

The previous prime is 28382869. The next prime is 28382891. The reversal of 28382885 is 58828382.

It can be written as a sum of positive squares in 4 ways, for example, as 3771364 + 24611521 = 1942^2 + 4961^2 .

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

It is not a de Polignac number, because 28382885 - 2⁴ = 28382869 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, 76526 + ... + 76895.

It is an arithmetic number, because the mean of its divisors is an integer number (4372527).

Almost surely, 2^28382885 is an apocalyptic number.

It is an amenable number.

28382885 is a deficient number, since it is larger than the sum of its proper divisors (6597331).

28382885 is a wasteful number, since it uses less digits than its factorization.

28382885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153463.

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

The square root of 28382885 is about 5327.5590095277. The cubic root of 28382885 is about 305.0367598800.

The spelling of 28382885 in words is "twenty-eight million, three hundred eighty-two thousand, eight hundred eighty-five".