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12838471 = 195411249
BaseRepresentation
bin110000111110…
…011001000111
3220011021001221
4300332121013
511241312341
61135101211
7214060642
oct60763107
926137057
1012838471
117279808
124371807
132876839
1419c2a59
1511d8ed1
hexc3e647

12838471 has 8 divisors (see below), whose sum is σ = 13550000. Its totient is φ = 12130560.

The previous prime is 12838429. The next prime is 12838477. The reversal of 12838471 is 17483821.

It is a happy number.

12838471 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12838471 - 215 = 12805703 is a prime.

It is a super-3 number, since 3×128384713 (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12838477) 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 7 ways as a sum of consecutive naturals, for example, 9655 + ... + 10903.

It is an arithmetic number, because the mean of its divisors is an integer number (1693750).

Almost surely, 212838471 is an apocalyptic number.

12838471 is a deficient number, since it is larger than the sum of its proper divisors (711529).

12838471 is a wasteful number, since it uses less digits than its factorization.

12838471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809.

The product of its digits is 10752, while the sum is 34.

The square root of 12838471 is about 3583.0812159369. The cubic root of 12838471 is about 234.1555385911.

The spelling of 12838471 in words is "twelve million, eight hundred thirty-eight thousand, four hundred seventy-one".

Divisors: 1 19 541 1249 10279 23731 675709 12838471