28241887 has 2 divisors, whose sum is σ = 28241888. Its totient is φ = 28241886.

The previous prime is 28241849. The next prime is 28241891. The reversal of 28241887 is 78814282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28241887 - 2¹⁵ = 28209119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28241827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14120943 + 14120944.

It is an arithmetic number, because the mean of its divisors is an integer number (14120944).

Almost surely, 2^28241887 is an apocalyptic number.

28241887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28241887 is an equidigital number, since it uses as much as digits as its factorization.

28241887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 40.

The square root of 28241887 is about 5314.3096447234. The cubic root of 28241887 is about 304.5308095511.

The spelling of 28241887 in words is "twenty-eight million, two hundred forty-one thousand, eight hundred eighty-seven".