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13143828 = 2231095319
BaseRepresentation
bin110010001000…
…111100010100
3220201202221110
4302020330110
511331100303
61145415020
7216502125
oct62107424
926652843
1013143828
117468175
12449a470
132952819
141a6204c
151249703
hexc88f14

13143828 has 12 divisors (see below), whose sum is σ = 30668960. Its totient is φ = 4381272.

The previous prime is 13143827. The next prime is 13143847. The reversal of 13143828 is 82834131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 13143795 and 13143804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547648 + ... + 547671.

Almost surely, 213143828 is an apocalyptic number.

It is an amenable number.

13143828 is an abundant number, since it is smaller than the sum of its proper divisors (17525132).

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

13143828 is a wasteful number, since it uses less digits than its factorization.

13143828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095326 (or 1095324 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 13143828 is about 3625.4417661852. The cubic root of 13143828 is about 235.9974384477.

Adding to 13143828 its reverse (82834131), we get a palindrome (95977959).

The spelling of 13143828 in words is "thirteen million, one hundred forty-three thousand, eight hundred twenty-eight".

Divisors: 1 2 3 4 6 12 1095319 2190638 3285957 4381276 6571914 13143828