28181741843 has 4 divisors (see below), whose sum is σ = 28370881200. Its totient is φ = 27992602488.

The previous prime is 28181741747. The next prime is 28181741869. The reversal of 28181741843 is 34814718182.

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 28181741843 - 2¹⁴ = 28181725459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28181741873) 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, 94569455 + ... + 94569752.

It is an arithmetic number, because the mean of its divisors is an integer number (7092720300).

Almost surely, 2^28181741843 is an apocalyptic number.

28181741843 is a deficient number, since it is larger than the sum of its proper divisors (189139357).

28181741843 is a wasteful number, since it uses less digits than its factorization.

28181741843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189139356.

The product of its digits is 344064, while the sum is 47.

The spelling of 28181741843 in words is "twenty-eight billion, one hundred eighty-one million, seven hundred forty-one thousand, eight hundred forty-three".