Base | Representation |
---|---|
bin | 101110010100… |
… | …111100010000 |
3 | 211211222222121 |
4 | 232110330100 |
5 | 11102110100 |
6 | 1112144024 |
7 | 205140262 |
oct | 56247420 |
9 | 24758877 |
10 | 12144400 |
11 | 69452a4 |
12 | 4098014 |
13 | 2692948 |
14 | 1881b32 |
15 | 10ed51a |
hex | b94f10 |
12144400 has 60 divisors (see below), whose sum is σ = 29571892. Its totient is φ = 4792320.
The previous prime is 12144389. The next prime is 12144403. The reversal of 12144400 is 444121.
It can be written as a sum of positive squares in 6 ways, for example, as 2999824 + 9144576 = 1732^2 + 3024^2 .
It is a Harshad number since it is a multiple of its sum of digits (16).
It is not an unprimeable number, because it can be changed into a prime (12144403) 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 11 ways as a sum of consecutive naturals, for example, 38644 + ... + 38956.
Almost surely, 212144400 is an apocalyptic number.
12144400 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 12144400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14785946).
12144400 is an abundant number, since it is smaller than the sum of its proper divisors (17427492).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12144400 is a wasteful number, since it uses less digits than its factorization.
12144400 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 428 (or 417 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 16.
The square root of 12144400 is about 3484.8816335709. The cubic root of 12144400 is about 229.8575046786.
Adding to 12144400 its reverse (444121), we get a palindrome (12588521).
It can be divided in two parts, 12144 and 400, that added together give a square (12544 = 1122).
The spelling of 12144400 in words is "twelve million, one hundred forty-four thousand, four hundred".
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