28545893 has 2 divisors, whose sum is σ = 28545894. Its totient is φ = 28545892.

The previous prime is 28545887. The next prime is 28545899. The reversal of 28545893 is 39854582.

It is a balanced prime because it is at equal distance from previous prime (28545887) and next prime (28545899).

It can be written as a sum of positive squares in only one way, i.e., 21325924 + 7219969 = 4618^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 28545893 - 2²⁰ = 27497317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28545899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272946 + 14272947.

It is an arithmetic number, because the mean of its divisors is an integer number (14272947).

Almost surely, 2^28545893 is an apocalyptic number.

It is an amenable number.

28545893 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545893 is an equidigital number, since it uses as much as digits as its factorization.

28545893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 28545893 is about 5342.8356703159. The cubic root of 28545893 is about 305.6196057808.

The spelling of 28545893 in words is "twenty-eight million, five hundred forty-five thousand, eight hundred ninety-three".