28813751 has 2 divisors, whose sum is σ = 28813752. Its totient is φ = 28813750.

The previous prime is 28813723. The next prime is 28813781. The reversal of 28813751 is 15731882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28813751 - 2¹⁰ = 28812727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28813781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14406875 + 14406876.

It is an arithmetic number, because the mean of its divisors is an integer number (14406876).

Almost surely, 2^28813751 is an apocalyptic number.

28813751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28813751 is an equidigital number, since it uses as much as digits as its factorization.

28813751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 28813751 is about 5367.8441668886. The cubic root of 28813751 is about 306.5725500146.

The spelling of 28813751 in words is "twenty-eight million, eight hundred thirteen thousand, seven hundred fifty-one".