28753489 has 2 divisors, whose sum is σ = 28753490. Its totient is φ = 28753488.

The previous prime is 28753481. The next prime is 28753493. The reversal of 28753489 is 98435782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28005264 + 748225 = 5292^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28753489 - 2³ = 28753481 is a prime.

It is not a weakly prime, because it can be changed into another prime (28753481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14376744 + 14376745.

It is an arithmetic number, because the mean of its divisors is an integer number (14376745).

Almost surely, 2^28753489 is an apocalyptic number.

It is an amenable number.

28753489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28753489 is an equidigital number, since it uses as much as digits as its factorization.

28753489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 28753489 is about 5362.2279884391. The cubic root of 28753489 is about 306.3586756333.

The spelling of 28753489 in words is "twenty-eight million, seven hundred fifty-three thousand, four hundred eighty-nine".