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12308172 = 22347139157
BaseRepresentation
bin101110111100…
…111011001100
3212011022122020
4232330323030
511122330142
61115450140
7206421612
oct56747314
925138566
1012308172
116a47348
124156950
13271c356
1418c56b2
151131cec
hexbbcecc

12308172 has 48 divisors (see below), whose sum is σ = 29729280. Its totient is φ = 3961152.

The previous prime is 12308141. The next prime is 12308173. The reversal of 12308172 is 27180321.

It is not an unprimeable number, because it can be changed into a prime (12308173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78318 + ... + 78474.

It is an arithmetic number, because the mean of its divisors is an integer number (619360).

Almost surely, 212308172 is an apocalyptic number.

12308172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12308172 is an abundant number, since it is smaller than the sum of its proper divisors (17421108).

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

12308172 is a wasteful number, since it uses less digits than its factorization.

12308172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12308172 is about 3508.3004432346. The cubic root of 12308172 is about 230.8861341706.

Adding to 12308172 its reverse (27180321), we get a palindrome (39488493).

The spelling of 12308172 in words is "twelve million, three hundred eight thousand, one hundred seventy-two".

Divisors: 1 2 3 4 6 12 47 94 139 141 157 188 278 282 314 417 471 556 564 628 834 942 1668 1884 6533 7379 13066 14758 19599 21823 22137 26132 29516 39198 43646 44274 65469 78396 87292 88548 130938 261876 1025681 2051362 3077043 4102724 6154086 12308172