28454453 has 4 divisors (see below), whose sum is σ = 28475148. Its totient is φ = 28433760.

The previous prime is 28454449. The next prime is 28454479. The reversal of 28454453 is 35445482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21362884 + 7091569 = 4622^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 28454453 - 2² = 28454449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28454353) 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 in 3 ways as a sum of consecutive naturals, for example, 8126 + ... + 11087.

It is an arithmetic number, because the mean of its divisors is an integer number (7118787).

Almost surely, 2^28454453 is an apocalyptic number.

It is an amenable number.

28454453 is a deficient number, since it is larger than the sum of its proper divisors (20695).

28454453 is a wasteful number, since it uses less digits than its factorization.

28454453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20694.

The product of its digits is 76800, while the sum is 35.

The square root of 28454453 is about 5334.2715528927. The cubic root of 28454453 is about 305.2929300744.

The spelling of 28454453 in words is "twenty-eight million, four hundred fifty-four thousand, four hundred fifty-three".