228518992 has 20 divisors (see below), whose sum is σ = 476814100. Its totient is φ = 105470208.

The previous prime is 228518971. The next prime is 228519001. The reversal of 228518992 is 299815822.

It can be written as a sum of positive squares in 2 ways, for example, as 64064016 + 164454976 = 8004^2 + 12824^2 .

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, 549117 + ... + 549532.

It is an arithmetic number, because the mean of its divisors is an integer number (23840705).

Almost surely, 2^228518992 is an apocalyptic number.

It is an amenable number.

228518992 is an abundant number, since it is smaller than the sum of its proper divisors (248295108).

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

228518992 is a wasteful number, since it uses less digits than its factorization.

228518992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098670 (or 1098664 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The square root of 228518992 is about 15116.8446443033. The cubic root of 228518992 is about 611.3746584941.

The spelling of 228518992 in words is "two hundred twenty-eight million, five hundred eighteen thousand, nine hundred ninety-two".