228145164 has 48 divisors (see below), whose sum is σ = 579236448. Its totient is φ = 69470208.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145164 is 461541822.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7594 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (12067426).

Almost surely, 2^228145164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228145164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289618224).

228145164 is an abundant number, since it is smaller than the sum of its proper divisors (351091284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228145164 is a wasteful number, since it uses less digits than its factorization.

228145164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15194 (or 15192 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 228145164 is about 15104.4749660490. The cubic root of 228145164 is about 611.0410994860.

Adding to 228145164 its reverse (461541822), we get a palindrome (689686986).

The spelling of 228145164 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred sixty-four".