28543234544 has 20 divisors (see below), whose sum is σ = 60330018840. Its totient is φ = 12974197440.

The previous prime is 28543234537. The next prime is 28543234571. The reversal of 28543234544 is 44543234582.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 28543234495 and 28543234504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81088559 + ... + 81088910.

It is an arithmetic number, because the mean of its divisors is an integer number (3016500942).

Almost surely, 2^28543234544 is an apocalyptic number.

It is an amenable number.

28543234544 is an abundant number, since it is smaller than the sum of its proper divisors (31786784296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28543234544 is a wasteful number, since it uses less digits than its factorization.

28543234544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162177488 (or 162177482 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 44.

The spelling of 28543234544 in words is "twenty-eight billion, five hundred forty-three million, two hundred thirty-four thousand, five hundred forty-four".