28122269 has 8 divisors (see below), whose sum is σ = 32923968. Its totient is φ = 23516640.

The previous prime is 28122253. The next prime is 28122271. The reversal of 28122269 is 96222182.

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

It is not a de Polignac number, because 28122269 - 2⁴ = 28122253 is a prime.

It is a super-2 number, since 2×28122269² = 1581724027416722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28122209) 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, 48707 + ... + 49280.

It is an arithmetic number, because the mean of its divisors is an integer number (4115496).

Almost surely, 2^28122269 is an apocalyptic number.

It is an amenable number.

28122269 is a deficient number, since it is larger than the sum of its proper divisors (4801699).

28122269 is an equidigital number, since it uses as much as digits as its factorization.

28122269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98035.

The product of its digits is 6912, while the sum is 32.

The square root of 28122269 is about 5303.0433714990. The cubic root of 28122269 is about 304.1002562046.

The spelling of 28122269 in words is "twenty-eight million, one hundred twenty-two thousand, two hundred sixty-nine".