28043366784 has 256 divisors, whose sum is σ = 78765281280. Its totient is φ = 8830328832.

The previous prime is 28043366761. The next prime is 28043366789. The reversal of 28043366784 is 48766334082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043366789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125754897 + ... + 125755119.

It is an arithmetic number, because the mean of its divisors is an integer number (307676880).

Almost surely, 2^28043366784 is an apocalyptic number.

28043366784 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 28043366784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39382640640).

28043366784 is an abundant number, since it is smaller than the sum of its proper divisors (50721914496).

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

28043366784 is a wasteful number, since it uses less digits than its factorization.

28043366784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 28043366784 in words is "twenty-eight billion, forty-three million, three hundred sixty-six thousand, seven hundred eighty-four".