28986491 has 2 divisors, whose sum is σ = 28986492. Its totient is φ = 28986490.

The previous prime is 28986481. The next prime is 28986493. The reversal of 28986491 is 19468982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28986491 - 2⁶ = 28986427 is a prime.

Together with 28986493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28986493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14493245 + 14493246.

It is an arithmetic number, because the mean of its divisors is an integer number (14493246).

Almost surely, 2^28986491 is an apocalyptic number.

28986491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28986491 is an equidigital number, since it uses as much as digits as its factorization.

28986491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 28986491 is about 5383.9103818693. The cubic root of 28986491 is about 307.1839694948.

The spelling of 28986491 in words is "twenty-eight million, nine hundred eighty-six thousand, four hundred ninety-one".