228165444 has 96 divisors (see below), whose sum is σ = 641594240. Its totient is φ = 69704064.

The previous prime is 228165407. The next prime is 228165463. The reversal of 228165444 is 444561822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 228165399 and 228165408.

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 in 31 ways as a sum of consecutive naturals, for example, 228354 + ... + 229350.

Almost surely, 2^228165444 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 228165444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320797120).

228165444 is an abundant number, since it is smaller than the sum of its proper divisors (413428796).

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

228165444 is a wasteful number, since it uses less digits than its factorization.

228165444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1178 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 228165444 is about 15105.1462753593. The cubic root of 228165444 is about 611.0592042548.

The spelling of 228165444 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, four hundred forty-four".