28016502189 has 16 divisors (see below), whose sum is σ = 40329167424. Its totient is φ = 17197920000.

The previous prime is 28016502187. The next prime is 28016502221. The reversal of 28016502189 is 98120561082.

It is a happy number.

It is not a de Polignac number, because 28016502189 - 2¹ = 28016502187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28016502189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28016502187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880087 + ... + 911364.

It is an arithmetic number, because the mean of its divisors is an integer number (2520572964).

Almost surely, 2^28016502189 is an apocalyptic number.

It is an amenable number.

28016502189 is a deficient number, since it is larger than the sum of its proper divisors (12312665235).

28016502189 is a wasteful number, since it uses less digits than its factorization.

28016502189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791868.

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 28016502189 in words is "twenty-eight billion, sixteen million, five hundred two thousand, one hundred eighty-nine".