228568140 has 72 divisors (see below), whose sum is σ = 717247440. Its totient is φ = 58848384.

The previous prime is 228568133. The next prime is 228568141. The reversal of 228568140 is 41865822.

228568140 is digitally balanced in base 3, 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 junction number, because it is equal to n+sod(n) for n = 228568095 and 228568104.

It is not an unprimeable number, because it can be changed into a prime (228568141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16674 + ... + 27113.

It is an arithmetic number, because the mean of its divisors is an integer number (9961770).

Almost surely, 2^228568140 is an apocalyptic number.

228568140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228568140 is an abundant number, since it is smaller than the sum of its proper divisors (488679300).

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

228568140 is a wasteful number, since it uses less digits than its factorization.

228568140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43831 (or 43826 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 228568140 is about 15118.4701607008. The cubic root of 228568140 is about 611.4184851765.

The spelling of 228568140 in words is "two hundred twenty-eight million, five hundred sixty-eight thousand, one hundred forty".