228815660 has 24 divisors (see below), whose sum is σ = 480814656. Its totient is φ = 91468800.

The previous prime is 228815647. The next prime is 228815663. The reversal of 228815660 is 66518822.

It is a super-2 number, since 2×228815660² = 104713212522471200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (228815663) 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, 45260 + ... + 50060.

It is an arithmetic number, because the mean of its divisors is an integer number (20033944).

Almost surely, 2^228815660 is an apocalyptic number.

228815660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228815660 is an abundant number, since it is smaller than the sum of its proper divisors (251998996).

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

228815660 is a wasteful number, since it uses less digits than its factorization.

228815660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7193 (or 7191 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 228815660 is about 15126.6539591544. The cubic root of 228815660 is about 611.6391104241.

The spelling of 228815660 in words is "two hundred twenty-eight million, eight hundred fifteen thousand, six hundred sixty".