28193007986 has 48 divisors (see below), whose sum is σ = 50162280000. Its totient is φ = 11804870880.

The previous prime is 28193007967. The next prime is 28193007989. The reversal of 28193007986 is 68970039182.

It is not an unprimeable number, because it can be changed into a prime (28193007989) 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 23 ways as a sum of consecutive naturals, for example, 1560875 + ... + 1578833.

It is an arithmetic number, because the mean of its divisors is an integer number (1045047500).

Almost surely, 2^28193007986 is an apocalyptic number.

28193007986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28193007986 is a deficient number, since it is larger than the sum of its proper divisors (21969272014).

28193007986 is a wasteful number, since it uses less digits than its factorization.

28193007986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495 (or 18484 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 28193007986 in words is "twenty-eight billion, one hundred ninety-three million, seven thousand, nine hundred eighty-six".