28036539 has 6 divisors (see below), whose sum is σ = 40497236. Its totient is φ = 18691020.

The previous prime is 28036529. The next prime is 28036549. The reversal of 28036539 is 93563082.

It is an interprime number because it is at equal distance from previous prime (28036529) and next prime (28036549).

It is not a de Polignac number, because 28036539 - 2¹¹ = 28034491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28036529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1557577 + ... + 1557594.

Almost surely, 2^28036539 is an apocalyptic number.

28036539 is a deficient number, since it is larger than the sum of its proper divisors (12460697).

28036539 is a wasteful number, since it uses less digits than its factorization.

28036539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115177 (or 3115174 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 28036539 is about 5294.9541074498. The cubic root of 28036539 is about 303.7909277778.

The spelling of 28036539 in words is "twenty-eight million, thirty-six thousand, five hundred thirty-nine".