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9057142857 = 372571678181
BaseRepresentation
bin10000110111101100…
…10000100001001001
3212101012121112021110
420123312100201021
5122022112032412
64054422000533
7440305305210
oct103366204111
925335545243
109057142857
113928580534
121909276149
13b14569939
1461cc4c077
15380217d3c
hex21bd90849

9057142857 has 16 divisors (see below), whose sum is σ = 13855070592. Its totient is φ = 5155368960.

The previous prime is 9057142799. The next prime is 9057142867. The reversal of 9057142857 is 7582417509.

It is not a de Polignac number, because 9057142857 - 27 = 9057142729 is a prime.

It is a super-2 number, since 2×90571428572 (a number of 21 digits) contains 22 as substring.

9057142857 is a modest number, since divided by 142857 gives 9057 as remainder.

It is not an unprimeable number, because it can be changed into a prime (9057142867) 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, 833694 + ... + 844487.

It is an arithmetic number, because the mean of its divisors is an integer number (865941912).

Almost surely, 29057142857 is an apocalyptic number.

It is an amenable number.

9057142857 is a deficient number, since it is larger than the sum of its proper divisors (4797927735).

9057142857 is a wasteful number, since it uses less digits than its factorization.

9057142857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678448.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 9057142857 is about 95169.0225703721. The cubic root of 9057142857 is about 2084.4768325482.

The spelling of 9057142857 in words is "nine billion, fifty-seven million, one hundred forty-two thousand, eight hundred fifty-seven".

Divisors: 1 3 7 21 257 771 1799 5397 1678181 5034543 11747267 35241801 431292517 1293877551 3019047619 9057142857