228055986 has 64 divisors (see below), whose sum is σ = 543404160. Its totient is φ = 71523648.

The previous prime is 228055967. The next prime is 228055991. The reversal of 228055986 is 689550822.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72825 + ... + 75891.

It is an arithmetic number, because the mean of its divisors is an integer number (8490690).

Almost surely, 2^228055986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228055986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271702080).

228055986 is an abundant number, since it is smaller than the sum of its proper divisors (315348174).

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

228055986 is an equidigital number, since it uses as much as digits as its factorization.

228055986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 3089 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 228055986 is about 15101.5226384627. The cubic root of 228055986 is about 610.9614739767.

The spelling of 228055986 in words is "two hundred twenty-eight million, fifty-five thousand, nine hundred eighty-six".