228111660 has 288 divisors, whose sum is σ = 851497920. Its totient is φ = 50512896.

The previous prime is 228111647. The next prime is 228111679. The reversal of 228111660 is 66111822.

228111660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 978904 + ... + 979136.

It is an arithmetic number, because the mean of its divisors is an integer number (2956590).

Almost surely, 2^228111660 is an apocalyptic number.

228111660 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 228111660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425748960).

228111660 is an abundant number, since it is smaller than the sum of its proper divisors (623386260).

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

228111660 is a wasteful number, since it uses less digits than its factorization.

228111660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 228111660 is about 15103.3658500349. The cubic root of 228111660 is about 611.0111867719.

The spelling of 228111660 in words is "two hundred twenty-eight million, one hundred eleven thousand, six hundred sixty".