228506418 has 96 divisors (see below), whose sum is σ = 605314944. Its totient is φ = 60811776.

The previous prime is 228506393. The next prime is 228506419. The reversal of 228506418 is 814605822.

228506418 is a `hidden beast` number, since 2 + 2 + 8 + 5 + 0 + 641 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (228506419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 228696 + ... + 229692.

It is an arithmetic number, because the mean of its divisors is an integer number (6305364).

Almost surely, 2^228506418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228506418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302657472).

228506418 is an abundant number, since it is smaller than the sum of its proper divisors (376808526).

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

228506418 is a wasteful number, since it uses less digits than its factorization.

228506418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 228506418 is about 15116.4287449119. The cubic root of 228506418 is about 611.3634448879.

The spelling of 228506418 in words is "two hundred twenty-eight million, five hundred six thousand, four hundred eighteen".