228549816 has 128 divisors (see below), whose sum is σ = 708998400. Its totient is φ = 67616640.

The previous prime is 228549799. The next prime is 228549817. The reversal of 228549816 is 618945822.

228549816 is a `hidden beast` number, since 2 + 28 + 549 + 81 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228549817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101050 + ... + 103286.

It is an arithmetic number, because the mean of its divisors is an integer number (5539050).

Almost surely, 2^228549816 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 228549816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354499200).

228549816 is an abundant number, since it is smaller than the sum of its proper divisors (480448584).

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

228549816 is a wasteful number, since it uses less digits than its factorization.

228549816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2296 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 228549816 is about 15117.8641348571. The cubic root of 228549816 is about 611.4021458743.

The spelling of 228549816 in words is "two hundred twenty-eight million, five hundred forty-nine thousand, eight hundred sixteen".