228168140 has 12 divisors (see below), whose sum is σ = 479153136. Its totient is φ = 91267248.

The previous prime is 228168139. The next prime is 228168167. The reversal of 228168140 is 41861822.

It is a happy number.

228168140 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228168140² = 104121400222119200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 228168097 and 228168106.

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, 5704184 + ... + 5704223.

It is an arithmetic number, because the mean of its divisors is an integer number (39929428).

Almost surely, 2^228168140 is an apocalyptic number.

228168140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228168140 is an abundant number, since it is smaller than the sum of its proper divisors (250984996).

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

228168140 is a wasteful number, since it uses less digits than its factorization.

228168140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11408416 (or 11408414 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 228168140 is about 15105.2355162043. The cubic root of 228168140 is about 611.0616110013.

The spelling of 228168140 in words is "two hundred twenty-eight million, one hundred sixty-eight thousand, one hundred forty".