28043069136 has 320 divisors, whose sum is σ = 79914885120. Its totient is φ = 8453652480.

The previous prime is 28043069099. The next prime is 28043069141. The reversal of 28043069136 is 63196034082.

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 63 ways as a sum of consecutive naturals, for example, 220811505 + ... + 220811631.

It is an arithmetic number, because the mean of its divisors is an integer number (249734016).

Almost surely, 2^28043069136 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 28043069136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39957442560).

28043069136 is an abundant number, since it is smaller than the sum of its proper divisors (51871815984).

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

28043069136 is a wasteful number, since it uses less digits than its factorization.

28043069136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 28043069136 in words is "twenty-eight billion, forty-three million, sixty-nine thousand, one hundred thirty-six".