228507705589 has 4 divisors (see below), whose sum is σ = 228580971840. Its totient is φ = 228434439340.

The previous prime is 228507705553. The next prime is 228507705599. The reversal of 228507705589 is 985507705822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228507705589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228507705599) 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, 36628447 + ... + 36634684.

It is an arithmetic number, because the mean of its divisors is an integer number (57145242960).

Almost surely, 2^228507705589 is an apocalyptic number.

It is an amenable number.

228507705589 is a deficient number, since it is larger than the sum of its proper divisors (73266251).

228507705589 is an equidigital number, since it uses as much as digits as its factorization.

228507705589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73266250.

The product of its (nonzero) digits is 14112000, while the sum is 58.

The spelling of 228507705589 in words is "two hundred twenty-eight billion, five hundred seven million, seven hundred five thousand, five hundred eighty-nine".