| Base | Representation |
|---|---|
| bin | 10110101111000… |
| … | …001110110111000 |
| 3 | 222120201111122200 |
| 4 | 112233001312320 |
| 5 | 1240121132003 |
| 6 | 101503150200 |
| 7 | 12311035305 |
| oct | 2657016670 |
| 9 | 876644580 |
| 10 | 381427128 |
| 11 | 18633a935 |
| 12 | a78a5360 |
| 13 | 6103a934 |
| 14 | 3892c0ac |
| 15 | 237456a3 |
| hex | 16bc1db8 |
381427128 has 96 divisors (see below), whose sum is σ = 1098364800. Its totient is φ = 119237184.
The previous prime is 381427127. The next prime is 381427129. The reversal of 381427128 is 821724183.
381427128 is a `hidden beast` number, since 381 + 4 + 271 + 2 + 8 = 666.
It is an interprime number because it is at equal distance from previous prime (381427127) and next prime (381427129).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 381427092 and 381427101.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (381427127) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139551 + ... + 142257.
It is an arithmetic number, because the mean of its divisors is an integer number (11441300).
Almost surely, 2381427128 is an apocalyptic number.
381427128 is a gapful number since it is divisible by the number (38) 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 381427128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549182400).
381427128 is an abundant number, since it is smaller than the sum of its proper divisors (716937672).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
381427128 is a wasteful number, since it uses less digits than its factorization.
381427128 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2841 (or 2834 counting only the distinct ones).
The product of its digits is 21504, while the sum is 36.
The square root of 381427128 is about 19530.1594463537. The cubic root of 381427128 is about 725.2212581921.
The spelling of 381427128 in words is "three hundred eighty-one million, four hundred twenty-seven thousand, one hundred twenty-eight".
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