28665269 has 8 divisors (see below), whose sum is σ = 29534208. Its totient is φ = 27801360.

The previous prime is 28665257. The next prime is 28665283. The reversal of 28665269 is 96256682.

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 28665269 - 2¹⁶ = 28599733 is a prime.

It is a super-2 number, since 2×28665269² = 1643395293684722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28665569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12524 + ... + 14634.

It is an arithmetic number, because the mean of its divisors is an integer number (3691776).

Almost surely, 2^28665269 is an apocalyptic number.

It is an amenable number.

28665269 is a deficient number, since it is larger than the sum of its proper divisors (868939).

28665269 is a wasteful number, since it uses less digits than its factorization.

28665269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515.

The product of its digits is 311040, while the sum is 44.

The square root of 28665269 is about 5353.9956107565. The cubic root of 28665269 is about 306.0450365883.

The spelling of 28665269 in words is "twenty-eight million, six hundred sixty-five thousand, two hundred sixty-nine".