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12273430 = 2513194969
BaseRepresentation
bin101110110100…
…011100010110
3212002112222111
4232310130112
511120222210
61115021234
7206215411
oct56643426
925075874
1012273430
116a23234
12413a81a
1327095b0
1418b6b78
15112688a
hexbb4716

12273430 has 32 divisors (see below), whose sum is σ = 25048800. Its totient is φ = 4292352.

The previous prime is 12273403. The next prime is 12273433. The reversal of 12273430 is 3437221.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12273433) 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 15 ways as a sum of consecutive naturals, for example, 15 + ... + 4954.

It is an arithmetic number, because the mean of its divisors is an integer number (782775).

Almost surely, 212273430 is an apocalyptic number.

12273430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12273430 is an abundant number, since it is smaller than the sum of its proper divisors (12775370).

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

12273430 is a wasteful number, since it uses less digits than its factorization.

12273430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 12273430 is about 3503.3455439051. The cubic root of 12273430 is about 230.6686904200.

The spelling of 12273430 in words is "twelve million, two hundred seventy-three thousand, four hundred thirty".

Divisors: 1 2 5 10 13 19 26 38 65 95 130 190 247 494 1235 2470 4969 9938 24845 49690 64597 94411 129194 188822 322985 472055 645970 944110 1227343 2454686 6136715 12273430