228134909 has 16 divisors (see below), whose sum is σ = 243777600. Its totient is φ = 213110016.

The previous prime is 228134897. The next prime is 228134911. The reversal of 228134909 is 909431822.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228134909 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 (228134939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140102 + ... + 141720.

It is an arithmetic number, because the mean of its divisors is an integer number (15236100).

Almost surely, 2^228134909 is an apocalyptic number.

228134909 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

228134909 is a deficient number, since it is larger than the sum of its proper divisors (15642691).

228134909 is a wasteful number, since it uses less digits than its factorization.

228134909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 228134909 is about 15104.1354933012. The cubic root of 228134909 is about 611.0319440281.

The spelling of 228134909 in words is "two hundred twenty-eight million, one hundred thirty-four thousand, nine hundred nine".