28726769 has 2 divisors, whose sum is σ = 28726770. Its totient is φ = 28726768.

The previous prime is 28726751. The next prime is 28726771. The reversal of 28726769 is 96762782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27952369 + 774400 = 5287^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 28726769 - 2⁸ = 28726513 is a prime.

It is a super-2 number, since 2×28726769² = 1650454514358722, which contains 22 as substring.

Together with 28726771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28726969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363384 + 14363385.

It is an arithmetic number, because the mean of its divisors is an integer number (14363385).

Almost surely, 2^28726769 is an apocalyptic number.

It is an amenable number.

28726769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726769 is an equidigital number, since it uses as much as digits as its factorization.

28726769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 28726769 is about 5359.7359076731. The cubic root of 28726769 is about 306.2637487094.

The spelling of 28726769 in words is "twenty-eight million, seven hundred twenty-six thousand, seven hundred sixty-nine".