28118404705 has 16 divisors (see below), whose sum is σ = 35258895360. Its totient is φ = 21486282048.

The previous prime is 28118404697. The next prime is 28118404711. The reversal of 28118404705 is 50740481182.

It is not a de Polignac number, because 28118404705 - 2³ = 28118404697 is a prime.

It is a super-2 number, since 2×28118404705² (a number of 22 digits) contains 22 as substring.

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, 90897 + ... + 253966.

It is an arithmetic number, because the mean of its divisors is an integer number (2203680960).

Almost surely, 2^28118404705 is an apocalyptic number.

It is an amenable number.

28118404705 is a deficient number, since it is larger than the sum of its proper divisors (7140490655).

28118404705 is a wasteful number, since it uses less digits than its factorization.

28118404705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345600.

The product of its (nonzero) digits is 71680, while the sum is 40.

Adding to 28118404705 its reverse (50740481182), we get a palindrome (78858885887).

The spelling of 28118404705 in words is "twenty-eight billion, one hundred eighteen million, four hundred four thousand, seven hundred five".