28135228884 has 96 divisors (see below), whose sum is σ = 75561292800. Its totient is φ = 7981590528.

The previous prime is 28135228873. The next prime is 28135228889. The reversal of 28135228884 is 48882253182.

It is a happy number.

It is a super-3 number, since 3×28135228884³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135228889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10422967 + ... + 10425665.

It is an arithmetic number, because the mean of its divisors is an integer number (787096800).

Almost surely, 2^28135228884 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 28135228884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37780646400).

28135228884 is an abundant number, since it is smaller than the sum of its proper divisors (47426063916).

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

28135228884 is a wasteful number, since it uses less digits than its factorization.

28135228884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549 (or 3547 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 51.

The spelling of 28135228884 in words is "twenty-eight billion, one hundred thirty-five million, two hundred twenty-eight thousand, eight hundred eighty-four".