28841513 has 2 divisors, whose sum is σ = 28841514. Its totient is φ = 28841512.

The previous prime is 28841489. The next prime is 28841531. The reversal of 28841513 is 31514882.

Together with next prime (28841531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18550249 + 10291264 = 4307^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 28841513 - 2¹⁶ = 28775977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28841513.

It is not a weakly prime, because it can be changed into another prime (28841713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420756 + 14420757.

It is an arithmetic number, because the mean of its divisors is an integer number (14420757).

Almost surely, 2^28841513 is an apocalyptic number.

It is an amenable number.

28841513 is a deficient number, since it is larger than the sum of its proper divisors (1).

28841513 is an equidigital number, since it uses as much as digits as its factorization.

28841513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 28841513 is about 5370.4294986528. The cubic root of 28841513 is about 306.6709791192.

The spelling of 28841513 in words is "twenty-eight million, eight hundred forty-one thousand, five hundred thirteen".