228055220 has 24 divisors (see below), whose sum is σ = 494366208. Its totient is φ = 88279200.

The previous prime is 228055213. The next prime is 228055231. The reversal of 228055220 is 22550822.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 228055220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183296 + ... + 184535.

It is an arithmetic number, because the mean of its divisors is an integer number (20598592).

Almost surely, 2^228055220 is an apocalyptic number.

228055220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228055220 is an abundant number, since it is smaller than the sum of its proper divisors (266310988).

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

228055220 is a wasteful number, since it uses less digits than its factorization.

228055220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367871 (or 367869 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 228055220 is about 15101.4972767603. The cubic root of 228055220 is about 610.9607899386.

The spelling of 228055220 in words is "two hundred twenty-eight million, fifty-five thousand, two hundred twenty".