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12908620 = 225645431
BaseRepresentation
bin110001001111…
…100001001100
3220021211022001
4301033201030
511301033440
61140402044
7214502314
oct61174114
926254261
1012908620
11731748a
1243a6324
13289c74a
141a00444
1511eeb9a
hexc4f84c

12908620 has 12 divisors (see below), whose sum is σ = 27108144. Its totient is φ = 5163440.

The previous prime is 12908611. The next prime is 12908633. The reversal of 12908620 is 2680921.

12908620 = 124 + 134 + ... + 364.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 322696 + ... + 322735.

It is an arithmetic number, because the mean of its divisors is an integer number (2259012).

Almost surely, 212908620 is an apocalyptic number.

12908620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12908620 is an abundant number, since it is smaller than the sum of its proper divisors (14199524).

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

12908620 is a wasteful number, since it uses less digits than its factorization.

12908620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645440 (or 645438 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12908620 is about 3592.8568020449. The cubic root of 12908620 is about 234.5812370178.

The spelling of 12908620 in words is "twelve million, nine hundred eight thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 645431 1290862 2581724 3227155 6454310 12908620