28917269 has 2 divisors, whose sum is σ = 28917270. Its totient is φ = 28917268.

The previous prime is 28917253. The next prime is 28917281. The reversal of 28917269 is 96271982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 508369 = 5330^2 + 713^2 .

It is a cyclic number.

It is not a de Polignac number, because 28917269 - 2⁴ = 28917253 is a prime.

It is a super-2 number, since 2×28917269² = 1672416892836722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28917299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458634 + 14458635.

It is an arithmetic number, because the mean of its divisors is an integer number (14458635).

Almost surely, 2^28917269 is an apocalyptic number.

It is an amenable number.

28917269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917269 is an equidigital number, since it uses as much as digits as its factorization.

28917269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 28917269 is about 5377.4779404475. The cubic root of 28917269 is about 306.9392481654.

The spelling of 28917269 in words is "twenty-eight million, nine hundred seventeen thousand, two hundred sixty-nine".