228178660 has 24 divisors (see below), whose sum is σ = 479671416. Its totient is φ = 91176960.

The previous prime is 228178633. The next prime is 228178661. The reversal of 228178660 is 66871822.

It can be written as a sum of positive squares in 4 ways, for example, as 90022144 + 138156516 = 9488^2 + 11754^2 .

It is not an unprimeable number, because it can be changed into a prime (228178661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15844 + ... + 26596.

It is an arithmetic number, because the mean of its divisors is an integer number (19986309).

Almost surely, 2^228178660 is an apocalyptic number.

228178660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228178660 is an abundant number, since it is smaller than the sum of its proper divisors (251492756).

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

228178660 is a wasteful number, since it uses less digits than its factorization.

228178660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11823 (or 11821 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 228178660 is about 15105.5837358243. The cubic root of 228178660 is about 611.0710021304.

The spelling of 228178660 in words is "two hundred twenty-eight million, one hundred seventy-eight thousand, six hundred sixty".