28340188243 has 4 divisors (see below), whose sum is σ = 28600190080. Its totient is φ = 28080186408.

The previous prime is 28340188213. The next prime is 28340188307. The reversal of 28340188243 is 34288104382.

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 28340188243 - 2¹³ = 28340180051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28340188243.

It is not an unprimeable number, because it can be changed into a prime (28340188213) 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, 130000755 + ... + 130000972.

It is an arithmetic number, because the mean of its divisors is an integer number (7150047520).

Almost surely, 2^28340188243 is an apocalyptic number.

28340188243 is a deficient number, since it is larger than the sum of its proper divisors (260001837).

28340188243 is a wasteful number, since it uses less digits than its factorization.

28340188243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260001836.

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 28340188243 in words is "twenty-eight billion, three hundred forty million, one hundred eighty-eight thousand, two hundred forty-three".