28113539 has 2 divisors, whose sum is σ = 28113540. Its totient is φ = 28113538.

The previous prime is 28113523. The next prime is 28113571. The reversal of 28113539 is 93531182.

It is an a-pointer prime, because the next prime (28113571) can be obtained adding 28113539 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28113539 - 2⁴ = 28113523 is a prime.

It is not a weakly prime, because it can be changed into another prime (28113439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14056769 + 14056770.

It is an arithmetic number, because the mean of its divisors is an integer number (14056770).

Almost surely, 2^28113539 is an apocalyptic number.

28113539 is a deficient number, since it is larger than the sum of its proper divisors (1).

28113539 is an equidigital number, since it uses as much as digits as its factorization.

28113539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 28113539 is about 5302.2201953521. The cubic root of 28113539 is about 304.0687856525.

The spelling of 28113539 in words is "twenty-eight million, one hundred thirteen thousand, five hundred thirty-nine".