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12893126380 = 2251987324437
BaseRepresentation
bin11000000000111110…
…10111111011101100
31020021112200200102021
430000133113323230
5202401120021010
65531212235524
7634334523511
oct140037277354
936245620367
1012893126380
115516919752
1225b9a6bba4
1312a61c2684
148a44a9308
15506d908da
hex3007d7eec

12893126380 has 24 divisors (see below), whose sum is σ = 27089275248. Its totient is φ = 5154639168.

The previous prime is 12893126371. The next prime is 12893126387. The reversal of 12893126380 is 8362139821.

It is not an unprimeable number, because it can be changed into a prime (12893126387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122479 + ... + 201958.

It is an arithmetic number, because the mean of its divisors is an integer number (1128719802).

Almost surely, 212893126380 is an apocalyptic number.

12893126380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12893126380 is an abundant number, since it is smaller than the sum of its proper divisors (14196148868).

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

12893126380 is a wasteful number, since it uses less digits than its factorization.

12893126380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326433 (or 326431 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 12893126380 in words is "twelve billion, eight hundred ninety-three million, one hundred twenty-six thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 1987 3974 7948 9935 19870 39740 324437 648874 1297748 1622185 3244370 6488740 644656319 1289312638 2578625276 3223281595 6446563190 12893126380