28881088056 has 64 divisors (see below), whose sum is σ = 80366580000. Its totient is φ = 9610069248.

The previous prime is 28881088043. The next prime is 28881088057. The reversal of 28881088056 is 65088018882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 28881087993 and 28881088011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28881088057) 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 15 ways as a sum of consecutive naturals, for example, 5410 + ... + 240398.

Almost surely, 2^28881088056 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 28881088056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40183290000).

28881088056 is an abundant number, since it is smaller than the sum of its proper divisors (51485491944).

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

28881088056 is a wasteful number, since it uses less digits than its factorization.

28881088056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235573 (or 235563 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 54.

The spelling of 28881088056 in words is "twenty-eight billion, eight hundred eighty-one million, eighty-eight thousand, fifty-six".