28519537 has 2 divisors, whose sum is σ = 28519538. Its totient is φ = 28519536.

The previous prime is 28519531. The next prime is 28519549. The reversal of 28519537 is 73591582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 11840481 = 4084^2 + 3441^2 .

It is a cyclic number.

It is not a de Polignac number, because 28519537 - 2³ = 28519529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28519537.

It is not a weakly prime, because it can be changed into another prime (28519531) 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, 14259768 + 14259769.

It is an arithmetic number, because the mean of its divisors is an integer number (14259769).

Almost surely, 2^28519537 is an apocalyptic number.

It is an amenable number.

28519537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28519537 is an equidigital number, since it uses as much as digits as its factorization.

28519537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 28519537 is about 5340.3686202359. The cubic root of 28519537 is about 305.5255188007.

The spelling of 28519537 in words is "twenty-eight million, five hundred nineteen thousand, five hundred thirty-seven".