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57838907 = 7194311009
BaseRepresentation
bin1101110010100…
…0110100111011
311000211112001202
43130220310323
5104301321112
65423404415
71301423360
oct334506473
9130745052
1057838907
112a715255
121745370b
13bca1409
147978467
1551276c2
hex3728d3b

57838907 has 16 divisors (see below), whose sum is σ = 69811200. Its totient is φ = 46811520.

The previous prime is 57838903. The next prime is 57838909. The reversal of 57838907 is 70983875.

It is not a de Polignac number, because 57838907 - 22 = 57838903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57838903) 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, 56819 + ... + 57827.

It is an arithmetic number, because the mean of its divisors is an integer number (4363200).

Almost surely, 257838907 is an apocalyptic number.

57838907 is a deficient number, since it is larger than the sum of its proper divisors (11972293).

57838907 is a wasteful number, since it uses less digits than its factorization.

57838907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 57838907 is about 7605.1894782444. The cubic root of 57838907 is about 386.7289575462.

The spelling of 57838907 in words is "fifty-seven million, eight hundred thirty-eight thousand, nine hundred seven".

Divisors: 1 7 19 133 431 1009 3017 7063 8189 19171 57323 134197 434879 3044153 8262701 57838907