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57383868 = 2234781989
BaseRepresentation
bin1101101011100…
…1101110111100
310222222101212110
43122321232330
5104142240433
65405534020
71264516623
oct332715674
9128871773
1057383868
112a434393
1217274310
13bb72269
14789a6ba
155087963
hex36b9bbc

57383868 has 12 divisors (see below), whose sum is σ = 133895720. Its totient is φ = 19127952.

The previous prime is 57383867. The next prime is 57383881. The reversal of 57383868 is 86838375.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57383861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390983 + ... + 2391006.

Almost surely, 257383868 is an apocalyptic number.

It is an amenable number.

57383868 is an abundant number, since it is smaller than the sum of its proper divisors (76511852).

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

57383868 is a wasteful number, since it uses less digits than its factorization.

57383868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781996 (or 4781994 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 57383868 is about 7575.2140563815. The cubic root of 57383868 is about 385.7121087081.

The spelling of 57383868 in words is "fifty-seven million, three hundred eighty-three thousand, eight hundred sixty-eight".

Divisors: 1 2 3 4 6 12 4781989 9563978 14345967 19127956 28691934 57383868