28238585 has 8 divisors (see below), whose sum is σ = 34802376. Its totient is φ = 21980160.

The previous prime is 28238569. The next prime is 28238591. The reversal of 28238585 is 58583282.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 26759929 = 1216^2 + 5173^2 .

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

It is not a de Polignac number, because 28238585 - 2⁴ = 28238569 is a prime.

It is a Duffinian 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, 76136 + ... + 76505.

It is an arithmetic number, because the mean of its divisors is an integer number (4350297).

Almost surely, 2^28238585 is an apocalyptic number.

It is an amenable number.

28238585 is a deficient number, since it is larger than the sum of its proper divisors (6563791).

28238585 is a wasteful number, since it uses less digits than its factorization.

28238585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152683.

The product of its digits is 153600, while the sum is 41.

The square root of 28238585 is about 5313.9989649980. The cubic root of 28238585 is about 304.5189406567.

The spelling of 28238585 in words is "twenty-eight million, two hundred thirty-eight thousand, five hundred eighty-five".