28000553 has 4 divisors (see below), whose sum is σ = 32000640. Its totient is φ = 24000468.

The previous prime is 28000543. The next prime is 28000559. The reversal of 28000553 is 35500082.

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.

It is a cyclic number.

It is not a de Polignac number, because 28000553 - 2¹⁸ = 27738409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28000559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000033 + ... + 2000046.

It is an arithmetic number, because the mean of its divisors is an integer number (8000160).

Almost surely, 2^28000553 is an apocalyptic number.

It is an amenable number.

28000553 is a deficient number, since it is larger than the sum of its proper divisors (4000087).

28000553 is an equidigital number, since it uses as much as digits as its factorization.

28000553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000086.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 28000553 is about 5291.5548754596. The cubic root of 28000553 is about 303.6608962621.

The spelling of 28000553 in words is "twenty-eight million, five hundred fifty-three", and thus it is an aban number.