228136660 has 12 divisors (see below), whose sum is σ = 479087028. Its totient is φ = 91254656.

The previous prime is 228136627. The next prime is 228136681. The reversal of 228136660 is 66631822.

It is a happy number.

228136660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 179667216 + 48469444 = 13404^2 + 6962^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5703397 + ... + 5703436.

It is an arithmetic number, because the mean of its divisors is an integer number (39923919).

Almost surely, 2^228136660 is an apocalyptic number.

228136660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228136660 is an abundant number, since it is smaller than the sum of its proper divisors (250950368).

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

228136660 is a wasteful number, since it uses less digits than its factorization.

228136660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406842 (or 11406840 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 228136660 is about 15104.1934574475. The cubic root of 228136660 is about 611.0335073051.

The spelling of 228136660 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, six hundred sixty".