28094453 has 4 divisors (see below), whose sum is σ = 28299660. Its totient is φ = 27889248.

The previous prime is 28094447. The next prime is 28094459. The reversal of 28094453 is 35449082.

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

It is an interprime number because it is at equal distance from previous prime (28094447) and next prime (28094459).

It can be written as a sum of positive squares in 2 ways, for example, as 18992164 + 9102289 = 4358^2 + 3017^2 .

It is a cyclic number.

It is not a de Polignac number, because 28094453 - 2⁸ = 28094197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28094459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102398 + ... + 102671.

It is an arithmetic number, because the mean of its divisors is an integer number (7074915).

Almost surely, 2^28094453 is an apocalyptic number.

It is an amenable number.

28094453 is a deficient number, since it is larger than the sum of its proper divisors (205207).

28094453 is a wasteful number, since it uses less digits than its factorization.

28094453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205206.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28094453 is about 5300.4200776920. The cubic root of 28094453 is about 303.9999603243. Note that the first 4 decimals are identical.

The spelling of 28094453 in words is "twenty-eight million, ninety-four thousand, four hundred fifty-three".