28978918118 has 4 divisors (see below), whose sum is σ = 43468377180. Its totient is φ = 14489459058.

The previous prime is 28978918109. The next prime is 28978918153. The reversal of 28978918118 is 81181987982.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7244729528 + ... + 7244729531.

It is an arithmetic number, because the mean of its divisors is an integer number (10867094295).

Almost surely, 2^28978918118 is an apocalyptic number.

28978918118 is a deficient number, since it is larger than the sum of its proper divisors (14489459062).

28978918118 is a wasteful number, since it uses less digits than its factorization.

28978918118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14489459061.

The product of its digits is 4644864, while the sum is 62.

The spelling of 28978918118 in words is "twenty-eight billion, nine hundred seventy-eight million, nine hundred eighteen thousand, one hundred eighteen".