28797649 has 2 divisors, whose sum is σ = 28797650. Its totient is φ = 28797648.

The previous prime is 28797623. The next prime is 28797653. The reversal of 28797649 is 94679782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28547649 + 250000 = 5343^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 28797649 - 2⁵ = 28797617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28797596 and 28797605.

It is not a weakly prime, because it can be changed into another prime (28797619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14398824 + 14398825.

It is an arithmetic number, because the mean of its divisors is an integer number (14398825).

Almost surely, 2^28797649 is an apocalyptic number.

It is an amenable number.

28797649 is a deficient number, since it is larger than the sum of its proper divisors (1).

28797649 is an equidigital number, since it uses as much as digits as its factorization.

28797649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 28797649 is about 5366.3441000368. The cubic root of 28797649 is about 306.5154320199.

The spelling of 28797649 in words is "twenty-eight million, seven hundred ninety-seven thousand, six hundred forty-nine".