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13438012 = 2271493221
BaseRepresentation
bin110011010000…
…110000111100
3221021201111011
4303100300330
511420004022
61200005004
7222135610
oct63206074
927251434
1013438012
1176491a5
124600764
132a266b3
141adb340
1512a6977
hexcd0c3c

13438012 has 24 divisors (see below), whose sum is σ = 27064800. Its totient is φ = 5718720.

The previous prime is 13438001. The next prime is 13438013. The reversal of 13438012 is 21083431.

It is a super-3 number, since 3×134380123 (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13438013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2562 + ... + 5782.

It is an arithmetic number, because the mean of its divisors is an integer number (1127700).

Almost surely, 213438012 is an apocalyptic number.

It is an amenable number.

13438012 is an abundant number, since it is smaller than the sum of its proper divisors (13626788).

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

13438012 is a wasteful number, since it uses less digits than its factorization.

13438012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 13438012 is about 3665.7894102089. The cubic root of 13438012 is about 237.7451547975.

The spelling of 13438012 in words is "thirteen million, four hundred thirty-eight thousand, twelve".

Divisors: 1 2 4 7 14 28 149 298 596 1043 2086 3221 4172 6442 12884 22547 45094 90188 479929 959858 1919716 3359503 6719006 13438012