228681908 has 48 divisors (see below), whose sum is σ = 493920000. Its totient is φ = 90215424.

The previous prime is 228681899. The next prime is 228681913. The reversal of 228681908 is 809186822.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 182468 + ... + 183716.

It is an arithmetic number, because the mean of its divisors is an integer number (10290000).

Almost surely, 2^228681908 is an apocalyptic number.

228681908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228681908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246960000).

228681908 is an abundant number, since it is smaller than the sum of its proper divisors (265238092).

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

228681908 is a wasteful number, since it uses less digits than its factorization.

228681908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 228681908 is about 15122.2322426287. The cubic root of 228681908 is about 611.5199112697.

The spelling of 228681908 in words is "two hundred twenty-eight million, six hundred eighty-one thousand, nine hundred eight".