28118422488 has 128 divisors (see below), whose sum is σ = 77115628800. Its totient is φ = 8490932736.

The previous prime is 28118422481. The next prime is 28118422489. The reversal of 28118422488 is 88422481182.

It is a happy number.

It is a super-2 number, since 2×28118422488² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28118422481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17431570 + ... + 17433182.

It is an arithmetic number, because the mean of its divisors is an integer number (602465850).

Almost surely, 2^28118422488 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 28118422488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38557814400).

28118422488 is an abundant number, since it is smaller than the sum of its proper divisors (48997206312).

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

28118422488 is a wasteful number, since it uses less digits than its factorization.

28118422488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2637 counting only the distinct ones).

The product of its digits is 524288, while the sum is 48.

The spelling of 28118422488 in words is "twenty-eight billion, one hundred eighteen million, four hundred twenty-two thousand, four hundred eighty-eight".