28645269 has 4 divisors (see below), whose sum is σ = 38193696. Its totient is φ = 19096844.

The previous prime is 28645237. The next prime is 28645283. The reversal of 28645269 is 96254682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28645269 - 2⁵ = 28645237 is a prime.

It is a super-2 number, since 2×28645269² = 1641102872164722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28645269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4774209 + ... + 4774214.

It is an arithmetic number, because the mean of its divisors is an integer number (9548424).

Almost surely, 2^28645269 is an apocalyptic number.

It is an amenable number.

28645269 is a deficient number, since it is larger than the sum of its proper divisors (9548427).

28645269 is an equidigital number, since it uses as much as digits as its factorization.

28645269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548426.

The product of its digits is 207360, while the sum is 42.

The square root of 28645269 is about 5352.1275209023. The cubic root of 28645269 is about 305.9738432937.

The spelling of 28645269 in words is "twenty-eight million, six hundred forty-five thousand, two hundred sixty-nine".