228738816 has 108 divisors (see below), whose sum is σ = 684122712. Its totient is φ = 76225536.

The previous prime is 228738779. The next prime is 228738823. The reversal of 228738816 is 618837822.

It is a tau number, because it is divible by the number of its divisors (108).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60370 + ... + 64046.

Almost surely, 2^228738816 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 228738816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342061356).

228738816 is an abundant number, since it is smaller than the sum of its proper divisors (455383896).

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

228738816 is an frugal number, since it uses more digits than its factorization.

228738816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708 (or 3682 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 228738816 is about 15124.1137260998. The cubic root of 228738816 is about 611.5706330913.

The spelling of 228738816 in words is "two hundred twenty-eight million, seven hundred thirty-eight thousand, eight hundred sixteen".