28692749 has 2 divisors, whose sum is σ = 28692750. Its totient is φ = 28692748.

The previous prime is 28692709. The next prime is 28692751. The reversal of 28692749 is 94729682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24571849 + 4120900 = 4957^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 28692749 - 2⁸ = 28692493 is a prime.

Together with 28692751, 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 (28692709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14346374 + 14346375.

It is an arithmetic number, because the mean of its divisors is an integer number (14346375).

Almost surely, 2^28692749 is an apocalyptic number.

It is an amenable number.

28692749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28692749 is an equidigital number, since it uses as much as digits as its factorization.

28692749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 28692749 is about 5356.5613036723. The cubic root of 28692749 is about 306.1428021872.

The spelling of 28692749 in words is "twenty-eight million, six hundred ninety-two thousand, seven hundred forty-nine".