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12303680 = 26538449
BaseRepresentation
bin101110111011…
…110101000000
3212011002110212
4232323311000
511122204210
61115413252
7206402534
oct56736500
925132425
1012303680
116a43a34
124154228
13271a2ac
1418c3bc4
151130805
hexbbbd40

12303680 has 28 divisors (see below), whose sum is σ = 29298900. Its totient is φ = 4921344.

The previous prime is 12303677. The next prime is 12303691. The reversal of 12303680 is 8630321.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 10705984 = 1264^2 + 3272^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18905 + ... + 19544.

Almost surely, 212303680 is an apocalyptic number.

12303680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12303680 is an abundant number, since it is smaller than the sum of its proper divisors (16995220).

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

12303680 is an equidigital number, since it uses as much as digits as its factorization.

12303680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38466 (or 38456 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12303680 is about 3507.6601887868. The cubic root of 12303680 is about 230.8580426254.

The spelling of 12303680 in words is "twelve million, three hundred three thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 160 320 38449 76898 153796 192245 307592 384490 615184 768980 1230368 1537960 2460736 3075920 6151840 12303680