28267487 has 2 divisors, whose sum is σ = 28267488. Its totient is φ = 28267486.

The previous prime is 28267471. The next prime is 28267493. The reversal of 28267487 is 78476282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28267487 - 2⁴ = 28267471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28267087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14133743 + 14133744.

It is an arithmetic number, because the mean of its divisors is an integer number (14133744).

Almost surely, 2^28267487 is an apocalyptic number.

28267487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28267487 is an equidigital number, since it uses as much as digits as its factorization.

28267487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 28267487 is about 5316.7176904553. The cubic root of 28267487 is about 304.6227962556.

The spelling of 28267487 in words is "twenty-eight million, two hundred sixty-seven thousand, four hundred eighty-seven".