28986481 has 2 divisors, whose sum is σ = 28986482. Its totient is φ = 28986480.

The previous prime is 28986473. The next prime is 28986491. The reversal of 28986481 is 18468982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 9985600 = 4359^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 28986481 - 2³ = 28986473 is a prime.

It is a super-2 number, since 2×28986481² = 1680432161526722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28986401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14493240 + 14493241.

It is an arithmetic number, because the mean of its divisors is an integer number (14493241).

Almost surely, 2^28986481 is an apocalyptic number.

It is an amenable number.

28986481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28986481 is an equidigital number, since it uses as much as digits as its factorization.

28986481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 46.

The square root of 28986481 is about 5383.9094531762. The cubic root of 28986481 is about 307.1839341698.

The spelling of 28986481 in words is "twenty-eight million, nine hundred eighty-six thousand, four hundred eighty-one".