228729443 has 8 divisors (see below), whose sum is σ = 232733616. Its totient is φ = 224733600.

The previous prime is 228729437. The next prime is 228729451. The reversal of 228729443 is 344927822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228729443 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 228729443.

It is not an unprimeable number, because it can be changed into a prime (228729463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82388 + ... + 85118.

It is an arithmetic number, because the mean of its divisors is an integer number (29091702).

Almost surely, 2^228729443 is an apocalyptic number.

228729443 is a deficient number, since it is larger than the sum of its proper divisors (4004173).

228729443 is a wasteful number, since it uses less digits than its factorization.

228729443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165.

The product of its digits is 193536, while the sum is 41.

The square root of 228729443 is about 15123.8038535284. The cubic root of 228729443 is about 611.5622795611.

The spelling of 228729443 in words is "two hundred twenty-eight million, seven hundred twenty-nine thousand, four hundred forty-three".