28178887859 has 16 divisors (see below), whose sum is σ = 30042096000. Its totient is φ = 26354180736.

The previous prime is 28178887853. The next prime is 28178887883. The reversal of 28178887859 is 95878887182.

It is not a de Polignac number, because 28178887859 - 2²⁴ = 28162110643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28178887792 and 28178887801.

It is not an unprimeable number, because it can be changed into a prime (28178887853) 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, 2332667 + ... + 2344715.

It is an arithmetic number, because the mean of its divisors is an integer number (1877631000).

Almost surely, 2^28178887859 is an apocalyptic number.

28178887859 is a deficient number, since it is larger than the sum of its proper divisors (1863208141).

28178887859 is a wasteful number, since it uses less digits than its factorization.

28178887859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13634.

The product of its digits is 144506880, while the sum is 71.

The spelling of 28178887859 in words is "twenty-eight billion, one hundred seventy-eight million, eight hundred eighty-seven thousand, eight hundred fifty-nine".