| Base | Representation |
|---|---|
| bin | 10111001000111… |
| … | …010111101110000 |
| 3 | 1000001111100101000 |
| 4 | 113020322331300 |
| 5 | 1243340332030 |
| 6 | 102304442000 |
| 7 | 12422525052 |
| oct | 2710727560 |
| 9 | 1001440330 |
| 10 | 388214640 |
| 11 | 18a156450 |
| 12 | aa019300 |
| 13 | 62576208 |
| 14 | 397b78d2 |
| 15 | 24136860 |
| hex | 1723af70 |
388214640 has 160 divisors (see below), whose sum is σ = 1458835200. Its totient is φ = 94106880.
The previous prime is 388214639. The next prime is 388214641. The reversal of 388214640 is 46412883.
388214640 is a `hidden beast` number, since 3 + 8 + 8 + 2 + 1 + 4 + 640 = 666.
It is an interprime number because it is at equal distance from previous prime (388214639) and next prime (388214641).
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 = 388214595 and 388214604.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (388214641) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15591 + ... + 31929.
It is an arithmetic number, because the mean of its divisors is an integer number (9117720).
Almost surely, 2388214640 is an apocalyptic number.
388214640 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 388214640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729417600).
388214640 is an abundant number, since it is smaller than the sum of its proper divisors (1070620560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
388214640 is a wasteful number, since it uses less digits than its factorization.
388214640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 16372 (or 16360 counting only the distinct ones).
The product of its (nonzero) digits is 36864, while the sum is 36.
The square root of 388214640 is about 19703.1631978218. The cubic root of 388214640 is about 729.4977717746.
The spelling of 388214640 in words is "three hundred eighty-eight million, two hundred fourteen thousand, six hundred forty".
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