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57987257740 = 2257140836097
BaseRepresentation
bin110110000000010011…
…110101010110001100
312112200020020220102121
4312000103311112030
51422224214221430
642350004102324
74121656362316
oct660023652614
9175606226377
1057987257740
1122657328005
12b2a39949a4
135611771039
142b4143c7b6
151795bc4a7a
hexd804f558c

57987257740 has 24 divisors (see below), whose sum is σ = 123488360352. Its totient is φ = 22868213760.

The previous prime is 57987257729. The next prime is 57987257761. The reversal of 57987257740 is 4775278975.

It is a super-3 number, since 3×579872577403 (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20416629 + ... + 20419468.

It is an arithmetic number, because the mean of its divisors is an integer number (5145348348).

Almost surely, 257987257740 is an apocalyptic number.

It is an amenable number.

57987257740 is an abundant number, since it is smaller than the sum of its proper divisors (65501102612).

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

57987257740 is a wasteful number, since it uses less digits than its factorization.

57987257740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40836177 (or 40836175 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 61.

The spelling of 57987257740 in words is "fifty-seven billion, nine hundred eighty-seven million, two hundred fifty-seven thousand, seven hundred forty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 40836097 81672194 163344388 204180485 408360970 816721940 2899362887 5798725774 11597451548 14496814435 28993628870 57987257740