228909340 has 96 divisors (see below), whose sum is σ = 576253440. Its totient is φ = 75398400.

The previous prime is 228909323. The next prime is 228909341. The reversal of 228909340 is 43909822.

It is a self number, because there is not a number n which added to its sum of digits gives 228909340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228909341) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 94950 + ... + 97330.

It is an arithmetic number, because the mean of its divisors is an integer number (6002640).

Almost surely, 2^228909340 is an apocalyptic number.

228909340 is a gapful number since it is divisible by the number (20) 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 228909340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288126720).

228909340 is an abundant number, since it is smaller than the sum of its proper divisors (347344100).

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

228909340 is a wasteful number, since it uses less digits than its factorization.

228909340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2441 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 228909340 is about 15129.7501631719. The cubic root of 228909340 is about 611.7225699421.

The spelling of 228909340 in words is "two hundred twenty-eight million, nine hundred nine thousand, three hundred forty".