28263269 has 2 divisors, whose sum is σ = 28263270. Its totient is φ = 28263268.

The previous prime is 28263253. The next prime is 28263271. The reversal of 28263269 is 96236282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20367169 + 7896100 = 4513^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263269 - 2⁴ = 28263253 is a prime.

It is a super-2 number, since 2×28263269² = 1597624749132722, which contains 22 as substring.

Together with 28263271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28263229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131634 + 14131635.

It is an arithmetic number, because the mean of its divisors is an integer number (14131635).

Almost surely, 2^28263269 is an apocalyptic number.

It is an amenable number.

28263269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263269 is an equidigital number, since it uses as much as digits as its factorization.

28263269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 28263269 is about 5316.3210023474. The cubic root of 28263269 is about 304.6076438313.

The spelling of 28263269 in words is "twenty-eight million, two hundred sixty-three thousand, two hundred sixty-nine".