28275739 has 2 divisors, whose sum is σ = 28275740. Its totient is φ = 28275738.

The previous prime is 28275727. The next prime is 28275749. The reversal of 28275739 is 93757282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28275739 - 2⁹ = 28275227 is a prime.

It is a super-2 number, since 2×28275739² = 1599034831992242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28275695 and 28275704.

It is not a weakly prime, because it can be changed into another prime (28275719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137869 + 14137870.

It is an arithmetic number, because the mean of its divisors is an integer number (14137870).

Almost surely, 2^28275739 is an apocalyptic number.

28275739 is a deficient number, since it is larger than the sum of its proper divisors (1).

28275739 is an equidigital number, since it uses as much as digits as its factorization.

28275739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 28275739 is about 5317.4936765360. The cubic root of 28275739 is about 304.6524357580.

The spelling of 28275739 in words is "twenty-eight million, two hundred seventy-five thousand, seven hundred thirty-nine".