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13132808 = 2313197641
BaseRepresentation
bin110010000110…
…010000001000
3220201012211022
4302012100020
511330222213
61145252012
7216425033
oct62062010
926635738
1013132808
11745a967
124494008
13294a7c0
141a5c01a
151246308
hexc86408

13132808 has 32 divisors (see below), whose sum is σ = 26694360. Its totient is φ = 6021120.

The previous prime is 13132783. The next prime is 13132831. The reversal of 13132808 is 80823131.

It can be written as a sum of positive squares in 4 ways, for example, as 13118884 + 13924 = 3622^2 + 118^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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 7 ways as a sum of consecutive naturals, for example, 20168 + ... + 20808.

Almost surely, 213132808 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 13132808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13347180).

13132808 is an abundant number, since it is smaller than the sum of its proper divisors (13561552).

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

13132808 is a wasteful number, since it uses less digits than its factorization.

13132808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 13132808 is about 3623.9216327068. The cubic root of 13132808 is about 235.9314653048.

Adding to 13132808 its reverse (80823131), we get a palindrome (93955939).

The spelling of 13132808 in words is "thirteen million, one hundred thirty-two thousand, eight hundred eight".

Divisors: 1 2 4 8 13 26 52 104 197 394 641 788 1282 1576 2561 2564 5122 5128 8333 10244 16666 20488 33332 66664 126277 252554 505108 1010216 1641601 3283202 6566404 13132808