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12905208 = 2332237793
BaseRepresentation
bin110001001110…
…101011111000
3220021122121200
4301032223320
511300431313
61140334200
7214456341
oct61165370
926248550
1012905208
117314968
1243a4360
13289b024
1419dd0c8
1511edb73
hexc4eaf8

12905208 has 48 divisors (see below), whose sum is σ = 36475920. Its totient is φ = 4114176.

The previous prime is 12905183. The next prime is 12905209. The reversal of 12905208 is 80250921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12905209) 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 11 ways as a sum of consecutive naturals, for example, 2241 + ... + 5552.

It is an arithmetic number, because the mean of its divisors is an integer number (759915).

Almost surely, 212905208 is an apocalyptic number.

12905208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12905208 is an abundant number, since it is smaller than the sum of its proper divisors (23570712).

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

12905208 is a wasteful number, since it uses less digits than its factorization.

12905208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7828 (or 7821 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 12905208 is about 3592.3819396050. The cubic root of 12905208 is about 234.5605670646.

The spelling of 12905208 in words is "twelve million, nine hundred five thousand, two hundred eight".

Divisors: 1 2 3 4 6 8 9 12 18 23 24 36 46 69 72 92 138 184 207 276 414 552 828 1656 7793 15586 23379 31172 46758 62344 70137 93516 140274 179239 187032 280548 358478 537717 561096 716956 1075434 1433912 1613151 2150868 3226302 4301736 6452604 12905208