Base | Representation |
---|---|
bin | 110011001111… |
… | …010000100000 |
3 | 221021102000120 |
4 | 303033100200 |
5 | 11414304330 |
6 | 1155520240 |
7 | 222111612 |
oct | 63172040 |
9 | 27242016 |
10 | 13431840 |
11 | 76445a4 |
12 | 45b9080 |
13 | 2a23946 |
14 | 1ad8db2 |
15 | 12a4c10 |
hex | ccf420 |
13431840 has 48 divisors (see below), whose sum is σ = 42311808. Its totient is φ = 3581696.
The previous prime is 13431811. The next prime is 13431857. The reversal of 13431840 is 4813431.
It is a tau number, because it is divible by the number of its divisors (48).
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 13431840.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13512 + ... + 14471.
It is an arithmetic number, because the mean of its divisors is an integer number (881496).
Almost surely, 213431840 is an apocalyptic number.
13431840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
13431840 is an abundant number, since it is smaller than the sum of its proper divisors (28879968).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13431840 is a wasteful number, since it uses less digits than its factorization.
13431840 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 28001 (or 27993 counting only the distinct ones).
The product of its (nonzero) digits is 1152, while the sum is 24.
The square root of 13431840 is about 3664.9474757491. The cubic root of 13431840 is about 237.7087509058.
The spelling of 13431840 in words is "thirteen million, four hundred thirty-one thousand, eight hundred forty".
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