229101728 has 12 divisors (see below), whose sum is σ = 451044090. Its totient is φ = 114550848.

The previous prime is 229101713. The next prime is 229101731. The reversal of 229101728 is 827101922.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 189007504 + 40094224 = 13748^2 + 6332^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 7159429 = 229101728 / (2 + 2 + 9 + 1 + 0 + 1 + 7 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 229101694 and 229101703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3579683 + ... + 3579746.

Almost surely, 2^229101728 is an apocalyptic number.

It is an amenable number.

229101728 is a deficient number, since it is larger than the sum of its proper divisors (221942362).

229101728 is an equidigital number, since it uses as much as digits as its factorization.

229101728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159439 (or 7159431 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 229101728 is about 15136.1067649512. The cubic root of 229101728 is about 611.8938970515.

The spelling of 229101728 in words is "two hundred twenty-nine million, one hundred one thousand, seven hundred twenty-eight".