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12808004 = 22111717123
BaseRepresentation
bin110000110110…
…111101000100
3220002201021112
4300312331010
511234324004
61134304152
7213603056
oct60667504
926081245
1012808004
117258930
124358058
132865a01
1419b58d6
1511cee6e
hexc36f44

12808004 has 24 divisors (see below), whose sum is σ = 25891488. Its totient is φ = 5479040.

The previous prime is 12807989. The next prime is 12808009. The reversal of 12808004 is 40080821.

12808004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12808009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7814 + ... + 9309.

It is an arithmetic number, because the mean of its divisors is an integer number (1078812).

Almost surely, 212808004 is an apocalyptic number.

It is an amenable number.

12808004 is an abundant number, since it is smaller than the sum of its proper divisors (13083484).

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

12808004 is a wasteful number, since it uses less digits than its factorization.

12808004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17155 (or 17153 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 12808004 is about 3578.8271821925. The cubic root of 12808004 is about 233.9701668933.

Adding to 12808004 its reverse (40080821), we get a palindrome (52888825).

The spelling of 12808004 in words is "twelve million, eight hundred eight thousand, four".

Divisors: 1 2 4 11 17 22 34 44 68 187 374 748 17123 34246 68492 188353 291091 376706 582182 753412 1164364 3202001 6404002 12808004