28118534444 has 192 divisors, whose sum is σ = 68983971840. Its totient is φ = 9672929280.

The previous prime is 28118534443. The next prime is 28118534519. The reversal of 28118534444 is 44443581182.

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 = 28118534395 and 28118534404.

It is not an unprimeable number, because it can be changed into a prime (28118534443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13120037 + ... + 13122179.

It is an arithmetic number, because the mean of its divisors is an integer number (359291520).

Almost surely, 2^28118534444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28118534444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34491985920).

28118534444 is an abundant number, since it is smaller than the sum of its proper divisors (40865437396).

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

28118534444 is a wasteful number, since it uses less digits than its factorization.

28118534444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2318 counting only the distinct ones).

The product of its digits is 491520, while the sum is 44.

The spelling of 28118534444 in words is "twenty-eight billion, one hundred eighteen million, five hundred thirty-four thousand, four hundred forty-four".