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120280168 = 23172930497
BaseRepresentation
bin1110010101101…
…01010001101000
322101022212101001
413022311101220
5221242431133
615534004344
72660236021
oct712652150
9271285331
10120280168
11619932a8
12343466b4
131bbc45c8
1411d8dc48
15a85d87d
hex72b5468

120280168 has 32 divisors (see below), whose sum is σ = 247033800. Its totient is φ = 54648832.

The previous prime is 120280163. The next prime is 120280231. The reversal of 120280168 is 861082021.

It can be written as a sum of positive squares in 4 ways, for example, as 119202724 + 1077444 = 10918^2 + 1038^2 .

It is not an unprimeable number, because it can be changed into a prime (120280163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11305 + ... + 19192.

Almost surely, 2120280168 is an apocalyptic number.

It is an amenable number.

120280168 is an abundant number, since it is smaller than the sum of its proper divisors (126753632).

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

120280168 is a wasteful number, since it uses less digits than its factorization.

120280168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30549 (or 30545 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 120280168 is about 10967.2315558668. The cubic root of 120280168 is about 493.6259796827.

The spelling of 120280168 in words is "one hundred twenty million, two hundred eighty thousand, one hundred sixty-eight".

Divisors: 1 2 4 8 17 29 34 58 68 116 136 232 493 986 1972 3944 30497 60994 121988 243976 518449 884413 1036898 1768826 2073796 3537652 4147592 7075304 15035021 30070042 60140084 120280168