28757269 has 2 divisors, whose sum is σ = 28757270. Its totient is φ = 28757268.

The previous prime is 28757231. The next prime is 28757297. The reversal of 28757269 is 96275782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 8191044 = 4535^2 + 2862^2 .

It is a cyclic number.

It is not a de Polignac number, because 28757269 - 2⁹ = 28756757 is a prime.

It is a super-2 number, since 2×28757269² = 1653961040676722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28757569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14378634 + 14378635.

It is an arithmetic number, because the mean of its divisors is an integer number (14378635).

Almost surely, 2^28757269 is an apocalyptic number.

It is an amenable number.

28757269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28757269 is an equidigital number, since it uses as much as digits as its factorization.

28757269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 28757269 is about 5362.5804422871. The cubic root of 28757269 is about 306.3720999178.

The spelling of 28757269 in words is "twenty-eight million, seven hundred fifty-seven thousand, two hundred sixty-nine".