28915269 has 4 divisors (see below), whose sum is σ = 38553696. Its totient is φ = 19276844.

The previous prime is 28915261. The next prime is 28915309. The reversal of 28915269 is 96251982.

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 28915269 - 2³ = 28915261 is a prime.

It is a super-2 number, since 2×28915269² = 1672185562684722, 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 28915269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28915261) 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 3 ways as a sum of consecutive naturals, for example, 4819209 + ... + 4819214.

It is an arithmetic number, because the mean of its divisors is an integer number (9638424).

Almost surely, 2^28915269 is an apocalyptic number.

It is an amenable number.

28915269 is a deficient number, since it is larger than the sum of its proper divisors (9638427).

28915269 is an equidigital number, since it uses as much as digits as its factorization.

28915269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638426.

The product of its digits is 77760, while the sum is 42.

The square root of 28915269 is about 5377.2919764506. The cubic root of 28915269 is about 306.9321717404.

The spelling of 28915269 in words is "twenty-eight million, nine hundred fifteen thousand, two hundred sixty-nine".