28218452843 has 4 divisors (see below), whose sum is σ = 32249660400. Its totient is φ = 24187245288.

The previous prime is 28218452839. The next prime is 28218452849. The reversal of 28218452843 is 34825481282.

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

It is a cyclic number.

It is not a de Polignac number, because 28218452843 - 2² = 28218452839 is a prime.

It is a super-2 number, since 2×28218452843² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28218452849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015603768 + ... + 2015603781.

It is an arithmetic number, because the mean of its divisors is an integer number (8062415100).

Almost surely, 2^28218452843 is an apocalyptic number.

28218452843 is a deficient number, since it is larger than the sum of its proper divisors (4031207557).

28218452843 is an equidigital number, since it uses as much as digits as its factorization.

28218452843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031207556.

The product of its digits is 983040, while the sum is 47.

The spelling of 28218452843 in words is "twenty-eight billion, two hundred eighteen million, four hundred fifty-two thousand, eight hundred forty-three".