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13812680 = 235749331
BaseRepresentation
bin110100101100…
…001111001000
3221222202102202
4310230033020
512014001210
61212015332
7225256130
oct64541710
927882382
1013812680
117884742
124761548
132b280ab
141b97ac0
15132c9a5
hexd2c3c8

13812680 has 32 divisors (see below), whose sum is σ = 35519040. Its totient is φ = 4735680.

The previous prime is 13812661. The next prime is 13812683. The reversal of 13812680 is 8621831.

It is not an unprimeable number, because it can be changed into a prime (13812683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24386 + ... + 24945.

It is an arithmetic number, because the mean of its divisors is an integer number (1109970).

Almost surely, 213812680 is an apocalyptic number.

13812680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13812680 is an abundant number, since it is smaller than the sum of its proper divisors (21706360).

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

13812680 is a wasteful number, since it uses less digits than its factorization.

13812680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49349 (or 49345 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 13812680 is about 3716.5414029713. The cubic root of 13812680 is about 239.9344728515.

The spelling of 13812680 in words is "thirteen million, eight hundred twelve thousand, six hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 49331 98662 197324 246655 345317 394648 493310 690634 986620 1381268 1726585 1973240 2762536 3453170 6906340 13812680