28027553 has 4 divisors (see below), whose sum is σ = 28039728. Its totient is φ = 28015380.

The previous prime is 28027511. The next prime is 28027561. The reversal of 28027553 is 35572082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28027553 - 2⁸ = 28027297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28027583) 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, 1463 + ... + 7628.

It is an arithmetic number, because the mean of its divisors is an integer number (7009932).

Almost surely, 2^28027553 is an apocalyptic number.

It is an amenable number.

28027553 is a deficient number, since it is larger than the sum of its proper divisors (12175).

28027553 is an equidigital number, since it uses as much as digits as its factorization.

28027553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12174.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28027553 is about 5294.1054957377. The cubic root of 28027553 is about 303.7584682675.

The spelling of 28027553 in words is "twenty-eight million, twenty-seven thousand, five hundred fifty-three".