28343878113 has 16 divisors (see below), whose sum is σ = 38206546560. Its totient is φ = 18688820736.

The previous prime is 28343878091. The next prime is 28343878177. The reversal of 28343878113 is 31187834382.

It is not a de Polignac number, because 28343878113 - 2¹⁷ = 28343747041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28343878183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422431 + ... + 484907.

It is an arithmetic number, because the mean of its divisors is an integer number (2387909160).

Almost surely, 2^28343878113 is an apocalyptic number.

It is an amenable number.

28343878113 is a deficient number, since it is larger than the sum of its proper divisors (9862668447).

28343878113 is a wasteful number, since it uses less digits than its factorization.

28343878113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64136.

The product of its digits is 774144, while the sum is 48.

The spelling of 28343878113 in words is "twenty-eight billion, three hundred forty-three million, eight hundred seventy-eight thousand, one hundred thirteen".