28369661184 has 144 divisors (see below), whose sum is σ = 84096700800. Its totient is φ = 9433718784.

The previous prime is 28369661171. The next prime is 28369661219. The reversal of 28369661184 is 48116696382.

It is a tau number, because it is divible by the number of its divisors (144).

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 28369661184.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2988157 + ... + 2997635.

Almost surely, 2^28369661184 is an apocalyptic number.

28369661184 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 28369661184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42048350400).

28369661184 is an abundant number, since it is smaller than the sum of its proper divisors (55727039616).

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

28369661184 is an equidigital number, since it uses as much as digits as its factorization.

28369661184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937 (or 9917 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The spelling of 28369661184 in words is "twenty-eight billion, three hundred sixty-nine million, six hundred sixty-one thousand, one hundred eighty-four".