28689113 has 2 divisors, whose sum is σ = 28689114. Its totient is φ = 28689112.

The previous prime is 28689077. The next prime is 28689137. The reversal of 28689113 is 31198682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19465744 + 9223369 = 4412^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 28689113 - 2¹⁰ = 28688089 is a prime.

It is not a weakly prime, because it can be changed into another prime (28685113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14344556 + 14344557.

It is an arithmetic number, because the mean of its divisors is an integer number (14344557).

Almost surely, 2^28689113 is an apocalyptic number.

It is an amenable number.

28689113 is a deficient number, since it is larger than the sum of its proper divisors (1).

28689113 is an equidigital number, since it uses as much as digits as its factorization.

28689113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 28689113 is about 5356.2218960756. The cubic root of 28689113 is about 306.1298699739.

The spelling of 28689113 in words is "twenty-eight million, six hundred eighty-nine thousand, one hundred thirteen".