28389853 has 2 divisors, whose sum is σ = 28389854. Its totient is φ = 28389852.

The previous prime is 28389793. The next prime is 28389877. The reversal of 28389853 is 35898382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14417209 + 13972644 = 3797^2 + 3738^2 .

It is a cyclic number.

It is not a de Polignac number, because 28389853 - 2⁹ = 28389341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28389883) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14194926 + 14194927.

It is an arithmetic number, because the mean of its divisors is an integer number (14194927).

Almost surely, 2^28389853 is an apocalyptic number.

It is an amenable number.

28389853 is a deficient number, since it is larger than the sum of its proper divisors (1).

28389853 is an equidigital number, since it uses as much as digits as its factorization.

28389853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 28389853 is about 5328.2129274270. The cubic root of 28389853 is about 305.0617200186.

The spelling of 28389853 in words is "twenty-eight million, three hundred eighty-nine thousand, eight hundred fifty-three".