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12910660 = 225792219
BaseRepresentation
bin110001010000…
…000001000100
3220021221002121
4301100001010
511301120120
61140415324
7214511260
oct61200104
926257077
1012910660
117318a74
1243a7544
1328a0659
141a010a0
1512005aa
hexc50044

12910660 has 24 divisors (see below), whose sum is σ = 30985920. Its totient is φ = 4426464.

The previous prime is 12910657. The next prime is 12910661. The reversal of 12910660 is 6601921.

It is not an unprimeable number, because it can be changed into a prime (12910661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45970 + ... + 46249.

It is an arithmetic number, because the mean of its divisors is an integer number (1291080).

Almost surely, 212910660 is an apocalyptic number.

12910660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12910660 is an abundant number, since it is smaller than the sum of its proper divisors (18075260).

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

12910660 is a wasteful number, since it uses less digits than its factorization.

12910660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92235 (or 92233 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 12910660 is about 3593.1406874766. The cubic root of 12910660 is about 234.5935936321.

The spelling of 12910660 in words is "twelve million, nine hundred ten thousand, six hundred sixty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 92219 184438 368876 461095 645533 922190 1291066 1844380 2582132 3227665 6455330 12910660