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12938055 = 3513431543
BaseRepresentation
bin110001010110…
…101101000111
3220100022200020
4301112231013
511303004210
61141150223
7214654164
oct61265507
926308606
1012938055
117337609
1243bb373
1328acc70
141a0b06b
151208770
hexc56b47

12938055 has 32 divisors (see below), whose sum is σ = 22826496. Its totient is φ = 6217344.

The previous prime is 12938053. The next prime is 12938077. The reversal of 12938055 is 55083921.

It is not a de Polignac number, because 12938055 - 21 = 12938053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12938053) 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 31 ways as a sum of consecutive naturals, for example, 7614 + ... + 9156.

It is an arithmetic number, because the mean of its divisors is an integer number (713328).

Almost surely, 212938055 is an apocalyptic number.

12938055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12938055 is a deficient number, since it is larger than the sum of its proper divisors (9888441).

12938055 is a wasteful number, since it uses less digits than its factorization.

12938055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 12938055 is about 3596.9507919903. The cubic root of 12938055 is about 234.7594036751.

The spelling of 12938055 in words is "twelve million, nine hundred thirty-eight thousand, fifty-five".

Divisors: 1 3 5 13 15 39 43 65 129 195 215 559 645 1543 1677 2795 4629 7715 8385 20059 23145 60177 66349 100295 199047 300885 331745 862537 995235 2587611 4312685 12938055