228844438637 has 4 divisors (see below), whose sum is σ = 228892228860. Its totient is φ = 228796648416.

The previous prime is 228844438619. The next prime is 228844438651. The reversal of 228844438637 is 736834448822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66301615081 + 162542823556 = 257491^2 + 403166^2 .

It is a cyclic number.

It is not a de Polignac number, because 228844438637 - 2¹⁴ = 228844422253 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 (228844438657) 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, 23887928 + ... + 23897505.

It is an arithmetic number, because the mean of its divisors is an integer number (57223057215).

Almost surely, 2^228844438637 is an apocalyptic number.

It is an amenable number.

228844438637 is a deficient number, since it is larger than the sum of its proper divisors (47790223).

228844438637 is an equidigital number, since it uses as much as digits as its factorization.

228844438637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47790222.

The product of its digits is 49545216, while the sum is 59.

The spelling of 228844438637 in words is "two hundred twenty-eight billion, eight hundred forty-four million, four hundred thirty-eight thousand, six hundred thirty-seven".