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12808918 = 213148889
BaseRepresentation
bin110000110111…
…001011010110
3220002202112101
4300313023112
511234341133
61134312314
7213605533
oct60671326
926082471
1012808918
117259591
12435869a
132866255
1419b5d8a
1511d037d
hexc372d6

12808918 has 8 divisors (see below), whose sum is σ = 19360440. Its totient is φ = 6355440.

The previous prime is 12808903. The next prime is 12808937. The reversal of 12808918 is 81980821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 24183 + ... + 24706.

It is an arithmetic number, because the mean of its divisors is an integer number (2420055).

Almost surely, 212808918 is an apocalyptic number.

12808918 is a deficient number, since it is larger than the sum of its proper divisors (6551522).

12808918 is a wasteful number, since it uses less digits than its factorization.

12808918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49022.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 12808918 is about 3578.9548753791. The cubic root of 12808918 is about 233.9757322582.

The spelling of 12808918 in words is "twelve million, eight hundred eight thousand, nine hundred eighteen".

Divisors: 1 2 131 262 48889 97778 6404459 12808918