| Base | Representation |
|---|---|
| bin | 1110101101101000001001 |
| 3 | 21020221200100 |
| 4 | 32231220021 |
| 5 | 1441410110 |
| 6 | 214400013 |
| 7 | 44532423 |
| oct | 16555011 |
| 9 | 7227610 |
| 10 | 3856905 |
| 11 | 21a4828 |
| 12 | 1360009 |
| 13 | a506c0 |
| 14 | 725813 |
| 15 | 512bc0 |
| hex | 3ada09 |
3856905 has 48 divisors (see below), whose sum is σ = 7600320. Its totient is φ = 1793664.
The previous prime is 3856903. The next prime is 3856907. The reversal of 3856905 is 5096583.
3856905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (3856903) and next prime (3856907).
It is not a de Polignac number, because 3856905 - 21 = 3856903 is a prime.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is an Ulam number.
It is an alternating number because its digits alternate between odd and even.
It is a self number, because there is not a number n which added to its sum of digits gives 3856905.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3856903) 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 47 ways as a sum of consecutive naturals, for example, 10942 + ... + 11288.
It is an arithmetic number, because the mean of its divisors is an integer number (158340).
Almost surely, 23856905 is an apocalyptic number.
It is an amenable number.
3856905 is a deficient number, since it is larger than the sum of its proper divisors (3743415).
3856905 is a wasteful number, since it uses less digits than its factorization.
3856905 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 390 (or 387 counting only the distinct ones).
The product of its (nonzero) digits is 32400, while the sum is 36.
The square root of 3856905 is about 1963.9004557258. The cubic root of 3856905 is about 156.8241638321.
It can be divided in two parts, 3856 and 905, that added together give a square (4761 = 692).
The spelling of 3856905 in words is "three million, eight hundred fifty-six thousand, nine hundred five".
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