| Base | Representation |
|---|---|
| bin | 10110110001000… |
| … | …001011111100000 |
| 3 | 222121201001210100 |
| 4 | 112301001133200 |
| 5 | 1240234344140 |
| 6 | 101522302400 |
| 7 | 12315343422 |
| oct | 2661013740 |
| 9 | 877631710 |
| 10 | 381949920 |
| 11 | 1866676a0 |
| 12 | a7ab7a00 |
| 13 | 61191891 |
| 14 | 38a26812 |
| 15 | 237ea530 |
| hex | 16c417e0 |
381949920 has 144 divisors (see below), whose sum is σ = 1421954352. Its totient is φ = 92590080.
The previous prime is 381949901. The next prime is 381949921. The reversal of 381949920 is 29949183.
381949920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
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 (45).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (381949921) 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, 3784 + ... + 27896.
It is an arithmetic number, because the mean of its divisors is an integer number (9874683).
Almost surely, 2381949920 is an apocalyptic number.
381949920 is a gapful number since it is divisible by the number (30) 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 381949920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710977176).
381949920 is an abundant number, since it is smaller than the sum of its proper divisors (1040004432).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
381949920 is a wasteful number, since it uses less digits than its factorization.
381949920 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 24145 (or 24134 counting only the distinct ones).
The product of its (nonzero) digits is 139968, while the sum is 45.
The square root of 381949920 is about 19543.5390858462. The cubic root of 381949920 is about 725.5524414046.
The spelling of 381949920 in words is "three hundred eighty-one million, nine hundred forty-nine thousand, nine hundred twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •