28587249 has 12 divisors (see below), whose sum is σ = 42822416. Its totient is φ = 19058004.

The previous prime is 28587203. The next prime is 28587253. The reversal of 28587249 is 94278582.

28587249 is a `hidden beast` number, since 28 + 587 + 2 + 49 = 666.

It is not a de Polignac number, because 28587249 - 2⁷ = 28587121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28587269) 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 11 ways as a sum of consecutive naturals, for example, 58579 + ... + 59064.

Almost surely, 2^28587249 is an apocalyptic number.

It is an amenable number.

28587249 is a deficient number, since it is larger than the sum of its proper divisors (14235167).

28587249 is an equidigital number, since it uses as much as digits as its factorization.

28587249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117658 (or 117646 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28587249 is about 5346.7044990349. The cubic root of 28587249 is about 305.7671238566.

The spelling of 28587249 in words is "twenty-eight million, five hundred eighty-seven thousand, two hundred forty-nine".