28127861986 has 32 divisors (see below), whose sum is σ = 48336406272. Its totient is φ = 12025540800.

The previous prime is 28127861947. The next prime is 28127862013. The reversal of 28127861986 is 68916872182.

It is a happy number.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28127861986.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17612140 + ... + 17613736.

It is an arithmetic number, because the mean of its divisors is an integer number (1510512696).

Almost surely, 2^28127861986 is an apocalyptic number.

28127861986 is a deficient number, since it is larger than the sum of its proper divisors (20208544286).

28127861986 is a wasteful number, since it uses less digits than its factorization.

28127861986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874.

The product of its digits is 4644864, while the sum is 58.

The spelling of 28127861986 in words is "twenty-eight billion, one hundred twenty-seven million, eight hundred sixty-one thousand, nine hundred eighty-six".