28745889043 has 4 divisors (see below), whose sum is σ = 28819786320. Its totient is φ = 28671991768.

The previous prime is 28745889031. The next prime is 28745889059. The reversal of 28745889043 is 34098854782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34098854782 = 2 ⋅17049427391.

It is a cyclic number.

It is not a de Polignac number, because 28745889043 - 2⁹ = 28745888531 is a prime.

It is a super-2 number, since 2×28745889043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28745829043) 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, 36948055 + ... + 36948832.

It is an arithmetic number, because the mean of its divisors is an integer number (7204946580).

Almost surely, 2^28745889043 is an apocalyptic number.

28745889043 is a deficient number, since it is larger than the sum of its proper divisors (73897277).

28745889043 is an equidigital number, since it uses as much as digits as its factorization.

28745889043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73897276.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 28745889043 in words is "twenty-eight billion, seven hundred forty-five million, eight hundred eighty-nine thousand, forty-three".