28875313 has 2 divisors, whose sum is σ = 28875314. Its totient is φ = 28875312.

The previous prime is 28875293. The next prime is 28875331. The reversal of 28875313 is 31357882.

Together with next prime (28875331) 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., 25735329 + 3139984 = 5073^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 28875313 - 2²¹ = 26778161 is a prime.

It is not a weakly prime, because it can be changed into another prime (28875113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14437656 + 14437657.

It is an arithmetic number, because the mean of its divisors is an integer number (14437657).

Almost surely, 2^28875313 is an apocalyptic number.

It is an amenable number.

28875313 is a deficient number, since it is larger than the sum of its proper divisors (1).

28875313 is an equidigital number, since it uses as much as digits as its factorization.

28875313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 28875313 is about 5373.5754391280. The cubic root of 28875313 is about 306.7907304946.

The spelling of 28875313 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred thirteen".