28274887 has 2 divisors, whose sum is σ = 28274888. Its totient is φ = 28274886.

The previous prime is 28274809. The next prime is 28274921. The reversal of 28274887 is 78847282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28274887 - 2¹⁵ = 28242119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28274087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137443 + 14137444.

It is an arithmetic number, because the mean of its divisors is an integer number (14137444).

Almost surely, 2^28274887 is an apocalyptic number.

28274887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28274887 is an equidigital number, since it uses as much as digits as its factorization.

28274887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 46.

The square root of 28274887 is about 5317.4135630022. The cubic root of 28274887 is about 304.6493758146.

It can be divided in two parts, 28274 and 887, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28274887 in words is "twenty-eight million, two hundred seventy-four thousand, eight hundred eighty-seven".