28004303653 has 4 divisors (see below), whose sum is σ = 28261223980. Its totient is φ = 27747383328.

The previous prime is 28004303599. The next prime is 28004303659. The reversal of 28004303653 is 35630340082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35630340082 = 2 ⋅17815170041.

It can be written as a sum of positive squares in 2 ways, for example, as 9767961889 + 18236341764 = 98833^2 + 135042^2 .

It is a cyclic number.

It is not a de Polignac number, because 28004303653 - 2²⁵ = 27970749221 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 (28004303659) 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, 128460000 + ... + 128460217.

It is an arithmetic number, because the mean of its divisors is an integer number (7065305995).

Almost surely, 2^28004303653 is an apocalyptic number.

It is an amenable number.

28004303653 is a deficient number, since it is larger than the sum of its proper divisors (256920327).

28004303653 is a wasteful number, since it uses less digits than its factorization.

28004303653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256920326.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 28004303653 in words is "twenty-eight billion, four million, three hundred three thousand, six hundred fifty-three".