28936613 has 2 divisors, whose sum is σ = 28936614. Its totient is φ = 28936612.

The previous prime is 28936541. The next prime is 28936619. The reversal of 28936613 is 31663982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 10975969 = 4238^2 + 3313^2 .

It is a cyclic number.

It is not a de Polignac number, because 28936613 - 2²⁴ = 12159397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28936619) 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, 14468306 + 14468307.

It is an arithmetic number, because the mean of its divisors is an integer number (14468307).

Almost surely, 2^28936613 is an apocalyptic number.

It is an amenable number.

28936613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28936613 is an equidigital number, since it uses as much as digits as its factorization.

28936613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 28936613 is about 5379.2762524340. The cubic root of 28936613 is about 307.0076745138.

The spelling of 28936613 in words is "twenty-eight million, nine hundred thirty-six thousand, six hundred thirteen".