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12800512 = 29231087
BaseRepresentation
bin110000110101…
…001000000000
3220002100000001
4300311020000
511234104022
61134205344
7213542164
oct60651000
926070001
1012800512
11725323a
124353854
13286248a
1419b2ca4
1511ccb27
hexc35200

12800512 has 40 divisors (see below), whose sum is σ = 26712576. Its totient is φ = 6116352.

The previous prime is 12800503. The next prime is 12800533. The reversal of 12800512 is 21500821.

It is a self number, because there is not a number n which added to its sum of digits gives 12800512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11233 + ... + 12319.

Almost surely, 212800512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12800512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13356288).

12800512 is an abundant number, since it is smaller than the sum of its proper divisors (13912064).

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

12800512 is an equidigital number, since it uses as much as digits as its factorization.

12800512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12800512 is about 3577.7803174594. The cubic root of 12800512 is about 233.9245379677.

It can be divided in two parts, 12800 and 512, that multiplied together give a square (6553600 = 25602).

The spelling of 12800512 in words is "twelve million, eight hundred thousand, five hundred twelve".

Divisors: 1 2 4 8 16 23 32 46 64 92 128 184 256 368 512 736 1087 1472 2174 2944 4348 5888 8696 11776 17392 25001 34784 50002 69568 100004 139136 200008 278272 400016 556544 800032 1600064 3200128 6400256 12800512