28286391118 has 4 divisors (see below), whose sum is σ = 42429586680. Its totient is φ = 14143195558.

The previous prime is 28286391101. The next prime is 28286391149. The reversal of 28286391118 is 81119368282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071597778 + ... + 7071597781.

It is an arithmetic number, because the mean of its divisors is an integer number (10607396670).

Almost surely, 2^28286391118 is an apocalyptic number.

28286391118 is a deficient number, since it is larger than the sum of its proper divisors (14143195562).

28286391118 is a wasteful number, since it uses less digits than its factorization.

28286391118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143195561.

The product of its digits is 331776, while the sum is 49.

The spelling of 28286391118 in words is "twenty-eight billion, two hundred eighty-six million, three hundred ninety-one thousand, one hundred eighteen".