28044277189632 has 528 divisors, whose sum is σ = 98458230499200. Its totient is φ = 7577392250880.

The previous prime is 28044277189619. The next prime is 28044277189703. The reversal of 28044277189632 is 23698177244082.

It is a happy number.

28044277189632 is a `hidden beast` number, since 2 + 8 + 0 + 4 + 427 + 71 + 89 + 63 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (528).

It is a self number, because there is not a number n which added to its sum of digits gives 28044277189632.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32316219 + ... + 33172677.

It is an arithmetic number, because the mean of its divisors is an integer number (186473921400).

Almost surely, 2^{28044277189632} is an apocalyptic number.

28044277189632 is a gapful number since it is divisible by the number (22) 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 28044277189632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49229115249600).

28044277189632 is an abundant number, since it is smaller than the sum of its proper divisors (70413953309568).

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

28044277189632 is a wasteful number, since it uses less digits than its factorization.

28044277189632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856532 (or 856511 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 28044277189632 in words is "twenty-eight trillion, forty-four billion, two hundred seventy-seven million, one hundred eighty-nine thousand, six hundred thirty-two".