28755269 has 8 divisors (see below), whose sum is σ = 29835000. Its totient is φ = 27681472.

The previous prime is 28755247. The next prime is 28755281. The reversal of 28755269 is 96255782.

It can be written as a sum of positive squares in 4 ways, for example, as 7086244 + 21669025 = 2662^2 + 4655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28755269 - 2¹⁶ = 28689733 is a prime.

It is a super-2 number, since 2×28755269² = 1653730990524722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10007 + ... + 12555.

It is an arithmetic number, because the mean of its divisors is an integer number (3729375).

Almost surely, 2^28755269 is an apocalyptic number.

28755269 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28755269 is a deficient number, since it is larger than the sum of its proper divisors (1079731).

28755269 is a wasteful number, since it uses less digits than its factorization.

28755269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967.

The product of its digits is 302400, while the sum is 44.

The square root of 28755269 is about 5362.3939616556. The cubic root of 28755269 is about 306.3649972683.

The spelling of 28755269 in words is "twenty-eight million, seven hundred fifty-five thousand, two hundred sixty-nine".