28352978140284 has 144 divisors (see below), whose sum is σ = 84964881351168. Its totient is φ = 8098693098048.

The previous prime is 28352978140213. The next prime is 28352978140297. The reversal of 28352978140284 is 48204187925382.

28352978140284 is a `hidden beast` number, since 2 + 8 + 3 + 529 + 7 + 81 + 4 + 0 + 28 + 4 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25077562 + ... + 26183774.

It is an arithmetic number, because the mean of its divisors is an integer number (590033898272).

Almost surely, 2^{28352978140284} 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 28352978140284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42482440675584).

28352978140284 is an abundant number, since it is smaller than the sum of its proper divisors (56611903210884).

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

28352978140284 is a wasteful number, since it uses less digits than its factorization.

28352978140284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110006 (or 1109992 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 63.

The spelling of 28352978140284 in words is "twenty-eight trillion, three hundred fifty-two billion, nine hundred seventy-eight million, one hundred forty thousand, two hundred eighty-four".