Search a number
-
+
13662881 = 194117539
BaseRepresentation
bin110100000111…
…101010100001
3221201010221122
4310013222201
511444203011
61204502025
7224063321
oct64075241
927633848
1013662881
117792141
1246aa915
132aa4b5b
141b59281
1512ed3db
hexd07aa1

13662881 has 8 divisors (see below), whose sum is σ = 14733600. Its totient is φ = 12627360.

The previous prime is 13662877. The next prime is 13662893. The reversal of 13662881 is 18826631.

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

It is a cyclic number.

It is not a de Polignac number, because 13662881 - 22 = 13662877 is a prime.

It is a super-2 number, since 2×136628812 = 373348634440322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13662821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7991 + ... + 9548.

It is an arithmetic number, because the mean of its divisors is an integer number (1841700).

Almost surely, 213662881 is an apocalyptic number.

It is an amenable number.

13662881 is a deficient number, since it is larger than the sum of its proper divisors (1070719).

13662881 is a wasteful number, since it uses less digits than its factorization.

13662881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17599.

The product of its digits is 13824, while the sum is 35.

The square root of 13662881 is about 3696.3334535726. Note that the first 3 decimals coincide. The cubic root of 13662881 is about 239.0639523542.

The spelling of 13662881 in words is "thirteen million, six hundred sixty-two thousand, eight hundred eighty-one".

Divisors: 1 19 41 779 17539 333241 719099 13662881