228447139 has 16 divisors (see below), whose sum is σ = 249933600. Its totient is φ = 207926784.

The previous prime is 228447133. The next prime is 228447143. The reversal of 228447139 is 931744822.

It is a cyclic number.

It is not a de Polignac number, because 228447139 - 2²¹ = 226349987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228447133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111577 + ... + 113605.

It is an arithmetic number, because the mean of its divisors is an integer number (15620850).

Almost surely, 2^228447139 is an apocalyptic number.

228447139 is a deficient number, since it is larger than the sum of its proper divisors (21486461).

228447139 is a wasteful number, since it uses less digits than its factorization.

228447139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its digits is 96768, while the sum is 40.

The square root of 228447139 is about 15114.4678702229. The cubic root of 228447139 is about 611.3105738011.

The spelling of 228447139 in words is "two hundred twenty-eight million, four hundred forty-seven thousand, one hundred thirty-nine".