28985113 has 2 divisors, whose sum is σ = 28985114. Its totient is φ = 28985112.

The previous prime is 28985069. The next prime is 28985137. The reversal of 28985113 is 31158982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28387584 + 597529 = 5328^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 28985113 - 2¹³ = 28976921 is a prime.

It is not a weakly prime, because it can be changed into another prime (28982113) 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, 14492556 + 14492557.

It is an arithmetic number, because the mean of its divisors is an integer number (14492557).

Almost surely, 2^28985113 is an apocalyptic number.

It is an amenable number.

28985113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28985113 is an equidigital number, since it uses as much as digits as its factorization.

28985113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 28985113 is about 5383.7824064499. The cubic root of 28985113 is about 307.1791016385.

The spelling of 28985113 in words is "twenty-eight million, nine hundred eighty-five thousand, one hundred thirteen".