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228145168 = 2417838769
BaseRepresentation
bin11011001100100…
…11100000010000
3120220021222100001
431212103200100
5431401121133
634345535344
75440126156
oct1546234020
9526258301
10228145168
11107866929
12644a4554
133835cc54
142242b3d6
151506887d
hexd993810

228145168 has 20 divisors (see below), whose sum is σ = 468033660. Its totient is φ = 107362304.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145168 is 861541822.

It can be written as a sum of positive squares in 2 ways, for example, as 109160704 + 118984464 = 10448^2 + 10908^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419113 + ... + 419656.

It is an arithmetic number, because the mean of its divisors is an integer number (23401683).

Almost surely, 2228145168 is an apocalyptic number.

It is an amenable number.

228145168 is an abundant number, since it is smaller than the sum of its proper divisors (239888492).

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

228145168 is a wasteful number, since it uses less digits than its factorization.

228145168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838794 (or 838788 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 228145168 is about 15104.4750984601. The cubic root of 228145168 is about 611.0411030571.

The spelling of 228145168 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 16 17 34 68 136 272 838769 1677538 3355076 6710152 13420304 14259073 28518146 57036292 114072584 228145168