Base | Representation |
---|---|
bin | 100010010111… |
… | …0011110000000 |
3 | 1020220022111000 |
4 | 1010232132000 |
5 | 14103004003 |
6 | 1442052000 |
7 | 306064104 |
oct | 104563600 |
9 | 36808430 |
10 | 18016128 |
11 | a195869 |
12 | 604a000 |
13 | 396a440 |
14 | 256d904 |
15 | 18ad1a3 |
hex | 112e780 |
18016128 has 128 divisors (see below), whose sum is σ = 57405600. Its totient is φ = 5529600.
The previous prime is 18016109. The next prime is 18016133. The reversal of 18016128 is 82161081.
It is a tau number, because it is divible by the number of its divisors (128).
It is a super-2 number, since 2×180161282 = 649161736224768, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44728 + ... + 45128.
Almost surely, 218016128 is an apocalyptic number.
18016128 is a gapful number since it is divisible by the number (18) 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 18016128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28702800).
18016128 is an abundant number, since it is smaller than the sum of its proper divisors (39389472).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18016128 is a wasteful number, since it uses less digits than its factorization.
18016128 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 437 (or 419 counting only the distinct ones).
The product of its (nonzero) digits is 768, while the sum is 27.
The square root of 18016128 is about 4244.5409645803. The cubic root of 18016128 is about 262.1523888647.
The spelling of 18016128 in words is "eighteen million, sixteen thousand, one hundred twenty-eight".
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