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12880208 = 241126653
BaseRepresentation
bin110001001000…
…100101010000
3220020101022202
4301020211100
511244131313
61140022332
7214323425
oct61104520
926211282
1012880208
1172a8100
1243919a8
13288c833
1419d3d4c
1511e6558
hexc48950

12880208 has 30 divisors (see below), whose sum is σ = 27434442. Its totient is φ = 5853760.

The previous prime is 12880201. The next prime is 12880247. The reversal of 12880208 is 80208821.

It can be written as a sum of positive squares in only one way, i.e., 7441984 + 5438224 = 2728^2 + 2332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1391 + ... + 5262.

Almost surely, 212880208 is an apocalyptic number.

It is an amenable number.

12880208 is an abundant number, since it is smaller than the sum of its proper divisors (14554234).

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

12880208 is a wasteful number, since it uses less digits than its factorization.

12880208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683 (or 6666 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 12880208 is about 3588.9006673353. The cubic root of 12880208 is about 234.4090053889.

The spelling of 12880208 in words is "twelve million, eight hundred eighty thousand, two hundred eight".

Divisors: 1 2 4 8 11 16 22 44 88 121 176 242 484 968 1936 6653 13306 26612 53224 73183 106448 146366 292732 585464 805013 1170928 1610026 3220052 6440104 12880208