28743269 has 2 divisors, whose sum is σ = 28743270. Its totient is φ = 28743268.

The previous prime is 28743259. The next prime is 28743289. The reversal of 28743269 is 96234782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 7491169 = 4610^2 + 2737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28743269 is a prime.

It is a super-2 number, since 2×28743269² = 1652351025612722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1784786 and since 28743269 and 1784786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28743229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14371634 + 14371635.

It is an arithmetic number, because the mean of its divisors is an integer number (14371635).

Almost surely, 2^28743269 is an apocalyptic number.

It is an amenable number.

28743269 is a deficient number, since it is larger than the sum of its proper divisors (1).

28743269 is an equidigital number, since it uses as much as digits as its factorization.

28743269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 28743269 is about 5361.2749416533. The cubic root of 28743269 is about 306.3223744539.

The spelling of 28743269 in words is "twenty-eight million, seven hundred forty-three thousand, two hundred sixty-nine".