228134391 has 16 divisors (see below), whose sum is σ = 308904960. Its totient is φ = 149744160.

The previous prime is 228134377. The next prime is 228134443. The reversal of 228134391 is 193431822.

It is not a de Polignac number, because 228134391 - 2⁹ = 228133879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228134321) 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, 53890 + ... + 57968.

It is an arithmetic number, because the mean of its divisors is an integer number (19306560).

Almost surely, 2^228134391 is an apocalyptic number.

228134391 is a deficient number, since it is larger than the sum of its proper divisors (80770569).

228134391 is a wasteful number, since it uses less digits than its factorization.

228134391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366.

The product of its digits is 10368, while the sum is 33.

The square root of 228134391 is about 15104.1183456698. The cubic root of 228134391 is about 611.0314815608.

The spelling of 228134391 in words is "two hundred twenty-eight million, one hundred thirty-four thousand, three hundred ninety-one".