28475287 has 2 divisors, whose sum is σ = 28475288. Its totient is φ = 28475286.

The previous prime is 28475263. The next prime is 28475327. The reversal of 28475287 is 78257482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28475287 - 2¹⁹ = 27950999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28475087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14237643 + 14237644.

It is an arithmetic number, because the mean of its divisors is an integer number (14237644).

Almost surely, 2^28475287 is an apocalyptic number.

28475287 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475287 is an equidigital number, since it uses as much as digits as its factorization.

28475287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 43.

The square root of 28475287 is about 5336.2240395246. The cubic root of 28475287 is about 305.3674224709.

The spelling of 28475287 in words is "twenty-eight million, four hundred seventy-five thousand, two hundred eighty-seven".