28881745344 has 224 divisors, whose sum is σ = 88119671360. Its totient is φ = 9268494336.

The previous prime is 28881745339. The next prime is 28881745363. The reversal of 28881745344 is 44354718882.

28881745344 is a `hidden beast` number, since 28 + 8 + 81 + 7 + 4 + 534 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

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, 6199464 + ... + 6204120.

It is an arithmetic number, because the mean of its divisors is an integer number (393391390).

Almost surely, 2^28881745344 is an apocalyptic number.

28881745344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28881745344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44059835680).

28881745344 is an abundant number, since it is smaller than the sum of its proper divisors (59237926016).

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

28881745344 is a wasteful number, since it uses less digits than its factorization.

28881745344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812 (or 4796 counting only the distinct ones).

The product of its digits is 6881280, while the sum is 54.

The spelling of 28881745344 in words is "twenty-eight billion, eight hundred eighty-one million, seven hundred forty-five thousand, three hundred forty-four".