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12819868 = 2218117707
BaseRepresentation
bin110000111001…
…110110011100
3220010022112221
4300321312130
511240213433
61134435124
7213652465
oct60716634
926108487
1012819868
117266836
124362aa4
13286b229
1419b9d6c
1511d372d
hexc39d9c

12819868 has 12 divisors (see below), whose sum is σ = 22559992. Its totient is φ = 6374160.

The previous prime is 12819857. The next prime is 12819869. The reversal of 12819868 is 86891821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12819869) 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 3 ways as a sum of consecutive naturals, for example, 8130 + ... + 9577.

Almost surely, 212819868 is an apocalyptic number.

It is an amenable number.

12819868 is a deficient number, since it is larger than the sum of its proper divisors (9740124).

12819868 is a wasteful number, since it uses less digits than its factorization.

12819868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17892 (or 17890 counting only the distinct ones).

The product of its digits is 55296, while the sum is 43.

The square root of 12819868 is about 3580.4843247807. The cubic root of 12819868 is about 234.0423864581.

The spelling of 12819868 in words is "twelve million, eight hundred nineteen thousand, eight hundred sixty-eight".

Divisors: 1 2 4 181 362 724 17707 35414 70828 3204967 6409934 12819868