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57690143 = 7139211281
BaseRepresentation
bin1101110000010…
…0100000011111
311000112221222222
43130010200133
5104232041033
65420255555
71300233560
oct334044037
9130487888
1057690143
112a623505
12173a15bb
13bc4b7a4
14793a167
1550e8598
hex370481f

57690143 has 16 divisors (see below), whose sum is σ = 66958080. Its totient is φ = 48686400.

The previous prime is 57690119. The next prime is 57690167. The reversal of 57690143 is 34109675.

It is an interprime number because it is at equal distance from previous prime (57690119) and next prime (57690167).

It is not a de Polignac number, because 57690143 - 216 = 57624607 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57690343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205163 + ... + 205443.

It is an arithmetic number, because the mean of its divisors is an integer number (4184880).

Almost surely, 257690143 is an apocalyptic number.

57690143 is a deficient number, since it is larger than the sum of its proper divisors (9267937).

57690143 is a wasteful number, since it uses less digits than its factorization.

57690143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 57690143 is about 7595.4027542982. The cubic root of 57690143 is about 386.3971120547.

The spelling of 57690143 in words is "fifty-seven million, six hundred ninety thousand, one hundred forty-three".

Divisors: 1 7 139 211 281 973 1477 1967 29329 39059 59291 205303 273413 415037 8241449 57690143