28587117 has 8 divisors (see below), whose sum is σ = 41048224. Its totient is φ = 17592048.

The previous prime is 28587107. The next prime is 28587121. The reversal of 28587117 is 71178582.

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

It is not a de Polignac number, because 28587117 - 2¹⁴ = 28570733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 733003 = 28587117 / (2 + 8 + 5 + 8 + 7 + 1 + 1 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28587107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366463 + ... + 366540.

It is an arithmetic number, because the mean of its divisors is an integer number (5131028).

Almost surely, 2^28587117 is an apocalyptic number.

It is an amenable number.

28587117 is a deficient number, since it is larger than the sum of its proper divisors (12461107).

28587117 is a wasteful number, since it uses less digits than its factorization.

28587117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733019.

The product of its digits is 31360, while the sum is 39.

The square root of 28587117 is about 5346.6921549683. The cubic root of 28587117 is about 305.7666532351.

The spelling of 28587117 in words is "twenty-eight million, five hundred eighty-seven thousand, one hundred seventeen".