Base | Representation |
---|---|
bin | 11111101100010100010001 |
3 | 120122002102011 |
4 | 133230110101 |
5 | 4111323420 |
6 | 454022521 |
7 | 130421350 |
oct | 37542421 |
9 | 16562364 |
10 | 8307985 |
11 | 4764a04 |
12 | 2947a41 |
13 | 194b68a |
14 | 1163997 |
15 | ae195a |
hex | 7ec511 |
8307985 has 16 divisors (see below), whose sum is σ = 12064896. Its totient is φ = 5361408.
The previous prime is 8307983. The next prime is 8308021. The reversal of 8307985 is 5897038.
8307985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a cyclic number.
It is not a de Polignac number, because 8307985 - 21 = 8307983 is a prime.
It is a super-2 number, since 2×83079852 = 138045229520450, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (8307983) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6387 + ... + 7576.
It is an arithmetic number, because the mean of its divisors is an integer number (754056).
Almost surely, 28307985 is an apocalyptic number.
8307985 is a gapful number since it is divisible by the number (85) formed by its first and last digit.
It is an amenable number.
8307985 is a deficient number, since it is larger than the sum of its proper divisors (3756911).
8307985 is a wasteful number, since it uses less digits than its factorization.
8307985 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13992.
The product of its (nonzero) digits is 60480, while the sum is 40.
The square root of 8307985 is about 2882.3575420131. The cubic root of 8307985 is about 202.5342928256.
The spelling of 8307985 in words is "eight million, three hundred seven thousand, nine hundred eighty-five".
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