228615660 has 288 divisors, whose sum is σ = 904804992. Its totient is φ = 45342720.

The previous prime is 228615601. The next prime is 228615679. The reversal of 228615660 is 66516822.

228615660 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 (36).

It is a congruent number.

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, 278050 + ... + 278870.

It is an arithmetic number, because the mean of its divisors is an integer number (3141684).

Almost surely, 2^228615660 is an apocalyptic number.

228615660 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 228615660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452402496).

228615660 is an abundant number, since it is smaller than the sum of its proper divisors (676189332).

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

228615660 is a wasteful number, since it uses less digits than its factorization.

228615660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 228615660 is about 15120.0416666093. The cubic root of 228615660 is about 611.4608541511.

The spelling of 228615660 in words is "two hundred twenty-eight million, six hundred fifteen thousand, six hundred sixty".