28381789253 has 4 divisors (see below), whose sum is σ = 28384122720. Its totient is φ = 28379455788.

The previous prime is 28381789229. The next prime is 28381789307. The reversal of 28381789253 is 35298718382.

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 28381789253 - 2¹⁰ = 28381788229 is a prime.

It is a super-2 number, since 2×28381789253² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28381785253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148393 + ... + 1172846.

It is an arithmetic number, because the mean of its divisors is an integer number (7096030680).

Almost surely, 2^28381789253 is an apocalyptic number.

It is an amenable number.

28381789253 is a deficient number, since it is larger than the sum of its proper divisors (2333467).

28381789253 is a wasteful number, since it uses less digits than its factorization.

28381789253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333466.

The product of its digits is 5806080, while the sum is 56.

The spelling of 28381789253 in words is "twenty-eight billion, three hundred eighty-one million, seven hundred eighty-nine thousand, two hundred fifty-three".