28807289343 has 24 divisors (see below), whose sum is σ = 49622496768. Its totient is φ = 15745598352.

The previous prime is 28807289339. The next prime is 28807289351. The reversal of 28807289343 is 34398270882.

It is not a de Polignac number, because 28807289343 - 2² = 28807289339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28807289343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807289353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9938955 + ... + 9941852.

It is an arithmetic number, because the mean of its divisors is an integer number (2067604032).

Almost surely, 2^28807289343 is an apocalyptic number.

28807289343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28807289343 is a deficient number, since it is larger than the sum of its proper divisors (20815207425).

28807289343 is a wasteful number, since it uses less digits than its factorization.

28807289343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19880843 (or 19880840 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 28807289343 in words is "twenty-eight billion, eight hundred seven million, two hundred eighty-nine thousand, three hundred forty-three".