28580247 has 12 divisors (see below), whose sum is σ = 43711200. Its totient is φ = 17932608.

The previous prime is 28580231. The next prime is 28580297. The reversal of 28580247 is 74208582.

It is a happy number.

It is not a de Polignac number, because 28580247 - 2⁴ = 28580231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28580297) 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, 93247 + ... + 93552.

It is an arithmetic number, because the mean of its divisors is an integer number (3642600).

Almost surely, 2^28580247 is an apocalyptic number.

28580247 is a deficient number, since it is larger than the sum of its proper divisors (15130953).

28580247 is a wasteful number, since it uses less digits than its factorization.

28580247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186822 (or 186819 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 28580247 is about 5346.0496630690. The cubic root of 28580247 is about 305.7421575248.

The spelling of 28580247 in words is "twenty-eight million, five hundred eighty thousand, two hundred forty-seven".