228518444 has 48 divisors (see below), whose sum is σ = 506800896. Its totient is φ = 87566400.

The previous prime is 228518359. The next prime is 228518503. The reversal of 228518444 is 444815822.

It is a super-2 number, since 2×228518444² = 104441358496362272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228518398 and 228518407.

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, 12707 + ... + 24869.

It is an arithmetic number, because the mean of its divisors is an integer number (10558352).

Almost surely, 2^228518444 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 228518444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253400448).

228518444 is an abundant number, since it is smaller than the sum of its proper divisors (278282452).

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

228518444 is a wasteful number, since it uses less digits than its factorization.

228518444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12246 (or 12244 counting only the distinct ones).

The product of its digits is 81920, while the sum is 38.

The square root of 228518444 is about 15116.8265188167. The cubic root of 228518444 is about 611.3741697914.

The spelling of 228518444 in words is "two hundred twenty-eight million, five hundred eighteen thousand, four hundred forty-four".