28140269 has 2 divisors, whose sum is σ = 28140270. Its totient is φ = 28140268.

The previous prime is 28140199. The next prime is 28140319. The reversal of 28140269 is 96204182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 5004169 = 4810^2 + 2237^2 .

It is a cyclic number.

It is not a de Polignac number, because 28140269 - 2¹⁶ = 28074733 is a prime.

It is a super-2 number, since 2×28140269² = 1583749478784722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28140869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14070134 + 14070135.

It is an arithmetic number, because the mean of its divisors is an integer number (14070135).

Almost surely, 2^28140269 is an apocalyptic number.

It is an amenable number.

28140269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28140269 is an equidigital number, since it uses as much as digits as its factorization.

28140269 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28140269 is about 5304.7402386922. The cubic root of 28140269 is about 304.1651233883.

The spelling of 28140269 in words is "twenty-eight million, one hundred forty thousand, two hundred sixty-nine".