228142120 has 32 divisors (see below), whose sum is σ = 540338400. Its totient is φ = 86453568.

The previous prime is 228142097. The next prime is 228142121. The reversal of 228142120 is 21241822.

It is a junction number, because it is equal to n+sod(n) for n = 228142091 and 228142100.

It is not an unprimeable number, because it can be changed into a prime (228142121) 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, 149334 + ... + 150853.

It is an arithmetic number, because the mean of its divisors is an integer number (16885575).

Almost surely, 2^228142120 is an apocalyptic number.

228142120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228142120 is an abundant number, since it is smaller than the sum of its proper divisors (312196280).

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

228142120 is a wasteful number, since it uses less digits than its factorization.

228142120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300217 (or 300213 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 228142120 is about 15104.3742008731. The cubic root of 228142120 is about 611.0383818926.

Adding to 228142120 its reverse (21241822), we get a palindrome (249383942).

The spelling of 228142120 in words is "two hundred twenty-eight million, one hundred forty-two thousand, one hundred twenty".