28653389 has 2 divisors, whose sum is σ = 28653390. Its totient is φ = 28653388.

The previous prime is 28653371. The next prime is 28653403. The reversal of 28653389 is 98335682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26574025 + 2079364 = 5155^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 28653389 - 2²⁰ = 27604813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28653089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14326694 + 14326695.

It is an arithmetic number, because the mean of its divisors is an integer number (14326695).

Almost surely, 2^28653389 is an apocalyptic number.

It is an amenable number.

28653389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28653389 is an equidigital number, since it uses as much as digits as its factorization.

28653389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 28653389 is about 5352.8860439953. The cubic root of 28653389 is about 306.0027517659.

The spelling of 28653389 in words is "twenty-eight million, six hundred fifty-three thousand, three hundred eighty-nine".