28541287 has 16 divisors (see below), whose sum is σ = 30844800. Its totient is φ = 26330400.

The previous prime is 28541273. The next prime is 28541291. The reversal of 28541287 is 78214582.

It is a cyclic number.

It is not a de Polignac number, because 28541287 - 2⁷ = 28541159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28541087) 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 15 ways as a sum of consecutive naturals, for example, 205264 + ... + 205402.

It is an arithmetic number, because the mean of its divisors is an integer number (1927800).

Almost surely, 2^28541287 is an apocalyptic number.

28541287 is a deficient number, since it is larger than the sum of its proper divisors (2303513).

28541287 is a wasteful number, since it uses less digits than its factorization.

28541287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its digits is 35840, while the sum is 37.

The square root of 28541287 is about 5342.4046084137. The cubic root of 28541287 is about 305.6031672266.

The spelling of 28541287 in words is "twenty-eight million, five hundred forty-one thousand, two hundred eighty-seven".