228642120 has 96 divisors (see below), whose sum is σ = 849251520. Its totient is φ = 52260480.

The previous prime is 228642109. The next prime is 228642121. The reversal of 228642120 is 21246822.

It is a happy number.

228642120 is a `hidden beast` number, since 2 + 2 + 8 + 642 + 12 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (228642121) 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, 42846 + ... + 47885.

It is an arithmetic number, because the mean of its divisors is an integer number (8846370).

Almost surely, 2^228642120 is an apocalyptic number.

228642120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228642120 is an abundant number, since it is smaller than the sum of its proper divisors (620609400).

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

228642120 is a wasteful number, since it uses less digits than its factorization.

228642120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90755 (or 90748 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 228642120 is about 15120.9166388814. The cubic root of 228642120 is about 611.4844434217.

Adding to 228642120 its reverse (21246822), we get a palindrome (249888942).

The spelling of 228642120 in words is "two hundred twenty-eight million, six hundred forty-two thousand, one hundred twenty".