28718597918 has 4 divisors (see below), whose sum is σ = 43077896880. Its totient is φ = 14359298958.

The previous prime is 28718597881. The next prime is 28718597927. The reversal of 28718597918 is 81979581782.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7179649478 + ... + 7179649481.

It is an arithmetic number, because the mean of its divisors is an integer number (10769474220).

Almost surely, 2^28718597918 is an apocalyptic number.

28718597918 is a deficient number, since it is larger than the sum of its proper divisors (14359298962).

28718597918 is a wasteful number, since it uses less digits than its factorization.

28718597918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14359298961.

The product of its digits is 20321280, while the sum is 65.

The spelling of 28718597918 in words is "twenty-eight billion, seven hundred eighteen million, five hundred ninety-seven thousand, nine hundred eighteen".