228217420 has 12 divisors (see below), whose sum is σ = 479256624. Its totient is φ = 91286960.

The previous prime is 228217403. The next prime is 228217421. The reversal of 228217420 is 24712822.

228217420 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

228217420 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (228217421) 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 3 ways as a sum of consecutive naturals, for example, 5705416 + ... + 5705455.

It is an arithmetic number, because the mean of its divisors is an integer number (39938052).

Almost surely, 2^228217420 is an apocalyptic number.

228217420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228217420 is an abundant number, since it is smaller than the sum of its proper divisors (251039204).

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

228217420 is a wasteful number, since it uses less digits than its factorization.

228217420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11410880 (or 11410878 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 228217420 is about 15106.8666506328. The cubic root of 228217420 is about 611.1056004156.

The spelling of 228217420 in words is "two hundred twenty-eight million, two hundred seventeen thousand, four hundred twenty".