28043188141 has 4 divisors (see below), whose sum is σ = 28043523712. Its totient is φ = 28042852572.

The previous prime is 28043188139. The next prime is 28043188231. The reversal of 28043188141 is 14188134082.

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 28043188141 - 2¹ = 28043188139 is a prime.

It is a super-2 number, since 2×28043188141² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28043188094 and 28043188103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043188741) 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, 68260 + ... + 246466.

It is an arithmetic number, because the mean of its divisors is an integer number (7010880928).

Almost surely, 2^28043188141 is an apocalyptic number.

It is an amenable number.

28043188141 is a deficient number, since it is larger than the sum of its proper divisors (335571).

28043188141 is a wasteful number, since it uses less digits than its factorization.

28043188141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335570.

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 28043188141 in words is "twenty-eight billion, forty-three million, one hundred eighty-eight thousand, one hundred forty-one".