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12803980 = 225791457
BaseRepresentation
bin110000110101…
…111110001100
3220002111202111
4300311332030
511234211410
61134233404
7213555250
oct60657614
926074674
1012803980
117255902
124355864
132863c27
1419b4260
1511cdb8a
hexc35f8c

12803980 has 24 divisors (see below), whose sum is σ = 30729888. Its totient is φ = 4389888.

The previous prime is 12803977. The next prime is 12803983. The reversal of 12803980 is 8930821.

It is an interprime number because it is at equal distance from previous prime (12803977) and next prime (12803983).

It is not an unprimeable number, because it can be changed into a prime (12803983) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 45589 + ... + 45868.

It is an arithmetic number, because the mean of its divisors is an integer number (1280412).

Almost surely, 212803980 is an apocalyptic number.

12803980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12803980 is an abundant number, since it is smaller than the sum of its proper divisors (17925908).

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

12803980 is a wasteful number, since it uses less digits than its factorization.

12803980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91473 (or 91471 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12803980 is about 3578.2649426782. The cubic root of 12803980 is about 233.9456615250.

The spelling of 12803980 in words is "twelve million, eight hundred three thousand, nine hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 91457 182914 365828 457285 640199 914570 1280398 1829140 2560796 3200995 6401990 12803980