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57127385 = 572233173
BaseRepresentation
bin1101100111101…
…1000111011001
310222111101001002
43121323013121
5104111034020
65400234345
71262401100
oct331730731
9128441032
1057127385
112a279717
121716b9b5
13bab25b3
147831037
155036975
hex367b1d9

57127385 has 12 divisors (see below), whose sum is σ = 79745508. Its totient is φ = 39172896.

The previous prime is 57127379. The next prime is 57127393. The reversal of 57127385 is 58372175.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28526281 + 28601104 = 5341^2 + 5348^2 .

It is not a de Polignac number, because 57127385 - 210 = 57126361 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116342 + ... + 116831.

It is an arithmetic number, because the mean of its divisors is an integer number (6645459).

Almost surely, 257127385 is an apocalyptic number.

It is an amenable number.

57127385 is a deficient number, since it is larger than the sum of its proper divisors (22618123).

57127385 is a wasteful number, since it uses less digits than its factorization.

57127385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233192 (or 233185 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 57127385 is about 7558.2660048453. The cubic root of 57127385 is about 385.1365906530.

The spelling of 57127385 in words is "fifty-seven million, one hundred twenty-seven thousand, three hundred eighty-five".

Divisors: 1 5 7 35 49 245 233173 1165865 1632211 8161055 11425477 57127385