28539337 has 2 divisors, whose sum is σ = 28539338. Its totient is φ = 28539336.

The previous prime is 28539289. The next prime is 28539359. The reversal of 28539337 is 73393582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24167056 + 4372281 = 4916^2 + 2091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28539337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28539337.

It is not a weakly prime, because it can be changed into another prime (28539397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269668 + 14269669.

It is an arithmetic number, because the mean of its divisors is an integer number (14269669).

Almost surely, 2^28539337 is an apocalyptic number.

It is an amenable number.

28539337 is a deficient number, since it is larger than the sum of its proper divisors (1).

28539337 is an equidigital number, since it uses as much as digits as its factorization.

28539337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 28539337 is about 5342.2221032076. Note that the first 3 decimals coincide. The cubic root of 28539337 is about 305.5962072538.

The spelling of 28539337 in words is "twenty-eight million, five hundred thirty-nine thousand, three hundred thirty-seven".