28297797814 has 32 divisors (see below), whose sum is σ = 52800836256. Its totient is φ = 11174776320.

The previous prime is 28297797791. The next prime is 28297797883. The reversal of 28297797814 is 41879779282.

It is a super-2 number, since 2×28297797814² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2905237 + ... + 2914960.

It is an arithmetic number, because the mean of its divisors is an integer number (1650026133).

Almost surely, 2^28297797814 is an apocalyptic number.

28297797814 is a deficient number, since it is larger than the sum of its proper divisors (24503038442).

28297797814 is a wasteful number, since it uses less digits than its factorization.

28297797814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5820240.

The product of its digits is 28449792, while the sum is 64.

The spelling of 28297797814 in words is "twenty-eight billion, two hundred ninety-seven million, seven hundred ninety-seven thousand, eight hundred fourteen".