28280453 has 2 divisors, whose sum is σ = 28280454. Its totient is φ = 28280452.

The previous prime is 28280437. The next prime is 28280459. The reversal of 28280453 is 35408282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26697889 + 1582564 = 5167^2 + 1258^2 .

It is a cyclic number.

It is not a de Polignac number, because 28280453 - 2⁴ = 28280437 is a prime.

It is equal to p_1757813 and since 28280453 and 1757813 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28280459) 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, 14140226 + 14140227.

It is an arithmetic number, because the mean of its divisors is an integer number (14140227).

Almost surely, 2^28280453 is an apocalyptic number.

It is an amenable number.

28280453 is a deficient number, since it is larger than the sum of its proper divisors (1).

28280453 is an equidigital number, since it uses as much as digits as its factorization.

28280453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 28280453 is about 5317.9369119989. The cubic root of 28280453 is about 304.6693648974.

The spelling of 28280453 in words is "twenty-eight million, two hundred eighty thousand, four hundred fifty-three".