Search a number
-
+
12741680 = 245761373
BaseRepresentation
bin110000100110…
…110000110000
3212222100022002
4300212300300
511230213210
61133033132
7213205520
oct60466060
925870262
1012741680
117213016
1243257a8
132841773
141999680
1511ba4a5
hexc26c30

12741680 has 80 divisors (see below), whose sum is σ = 34503744. Its totient is φ = 4285440.

The previous prime is 12741679. The next prime is 12741689. The reversal of 12741680 is 8614721.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (12741689) 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, 33974 + ... + 34346.

Almost surely, 212741680 is an apocalyptic number.

12741680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12741680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17251872).

12741680 is an abundant number, since it is smaller than the sum of its proper divisors (21762064).

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

12741680 is a wasteful number, since it uses less digits than its factorization.

12741680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 12741680 is about 3569.5489911192. The cubic root of 12741680 is about 233.5656099684.

The spelling of 12741680 in words is "twelve million, seven hundred forty-one thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 35 40 56 61 70 80 112 122 140 244 280 305 373 427 488 560 610 746 854 976 1220 1492 1708 1865 2135 2440 2611 2984 3416 3730 4270 4880 5222 5968 6832 7460 8540 10444 13055 14920 17080 20888 22753 26110 29840 34160 41776 45506 52220 91012 104440 113765 159271 182024 208880 227530 318542 364048 455060 637084 796355 910120 1274168 1592710 1820240 2548336 3185420 6370840 12741680