| Base | Representation |
|---|---|
| bin | 101110111110… |
| … | …001101100000 |
| 3 | 212011120212100 |
| 4 | 232332031200 |
| 5 | 11123012230 |
| 6 | 1115530400 |
| 7 | 206443146 |
| oct | 56761540 |
| 9 | 25146770 |
| 10 | 12313440 |
| 11 | 6a502a7 |
| 12 | 4159a00 |
| 13 | 2721879 |
| 14 | 18c7596 |
| 15 | 1133660 |
| hex | bbe360 |
12313440 has 144 divisors (see below), whose sum is σ = 44579808. Its totient is φ = 3084288.
The previous prime is 12313409. The next prime is 12313447. The reversal of 12313440 is 4431321.
It is a tau number, because it is divible by the number of its divisors (144).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12313447) 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 23 ways as a sum of consecutive naturals, for example, 24229 + ... + 24731.
It is an arithmetic number, because the mean of its divisors is an integer number (309582).
Almost surely, 212313440 is an apocalyptic number.
12313440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12313440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22289904).
12313440 is an abundant number, since it is smaller than the sum of its proper divisors (32266368).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12313440 is a wasteful number, since it uses less digits than its factorization.
12313440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 541 (or 530 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 18.
The square root of 12313440 is about 3509.0511538021. The cubic root of 12313440 is about 230.9190698675.
Adding to 12313440 its reverse (4431321), we get a palindrome (16744761).
It can be divided in two parts, 1 and 2313440, that added together give a 4-th power (2313441 = 394).
The spelling of 12313440 in words is "twelve million, three hundred thirteen thousand, four hundred forty".
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