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13724138 = 243533011
BaseRepresentation
bin110100010110…
…100111101010
3221211020222102
4310112213222
512003133023
61210053402
7224440031
oct64264752
927736872
1013724138
11782416a
12471a262
132ac69bc
141b73718
151311628
hexd169ea

13724138 has 16 divisors (see below), whose sum is σ = 21469536. Its totient is φ = 6573840.

The previous prime is 13724131. The next prime is 13724143. The reversal of 13724138 is 83142731.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13724138.

It is not an unprimeable number, because it can be changed into a prime (13724131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3053 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (1341846).

Almost surely, 213724138 is an apocalyptic number.

13724138 is a deficient number, since it is larger than the sum of its proper divisors (7745398).

13724138 is a wasteful number, since it uses less digits than its factorization.

13724138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109.

The product of its digits is 4032, while the sum is 29.

The square root of 13724138 is about 3704.6103708757. The cubic root of 13724138 is about 239.4206977362.

Adding to 13724138 its reverse (83142731), we get a palindrome (96866869).

The spelling of 13724138 in words is "thirteen million, seven hundred twenty-four thousand, one hundred thirty-eight".

Divisors: 1 2 43 53 86 106 2279 3011 4558 6022 129473 159583 258946 319166 6862069 13724138