Search a number
-
+
12808460 = 2257191479
BaseRepresentation
bin110000110111…
…000100001100
3220002201220102
4300313010030
511234332320
61134310232
7213604310
oct60670414
926081812
1012808460
117259205
124358378
132865c92
1419b5b40
1511d0175
hexc3710c

12808460 has 48 divisors (see below), whose sum is σ = 30965760. Its totient is φ = 4359360.

The previous prime is 12808387. The next prime is 12808469. The reversal of 12808460 is 6480821.

It is not an unprimeable number, because it can be changed into a prime (12808469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26501 + ... + 26979.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 212808460 is an apocalyptic number.

12808460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12808460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15482880).

12808460 is an abundant number, since it is smaller than the sum of its proper divisors (18157300).

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

12808460 is a wasteful number, since it uses less digits than its factorization.

12808460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 12808460 is about 3578.8908896472. The cubic root of 12808460 is about 233.9729435198.

The spelling of 12808460 in words is "twelve million, eight hundred eight thousand, four hundred sixty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 191 382 479 764 955 958 1337 1910 1916 2395 2674 3353 3820 4790 5348 6685 6706 9580 13370 13412 16765 26740 33530 67060 91489 182978 365956 457445 640423 914890 1280846 1829780 2561692 3202115 6404230 12808460