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8670081 = 371812281
BaseRepresentation
bin100001000100…
…101110000001
3121022111010010
4201010232001
54204420311
6505455133
7133460130
oct41045601
917274103
108670081
114991a62
122aa14a9
131a47434
141219917
15b63da6
hex844b81

8670081 has 16 divisors (see below), whose sum is σ = 13290368. Its totient is φ = 4924800.

The previous prime is 8670071. The next prime is 8670089. The reversal of 8670081 is 1800768.

It is not a de Polignac number, because 8670081 - 213 = 8661889 is a prime.

It is a super-2 number, since 2×86700812 = 150340609093122, which contains 22 as substring.

It is the 2945-th Hogben number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8670089) by changing a digit.

It is a nontrivial repunit in base 2944.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661 + ... + 4941.

It is an arithmetic number, because the mean of its divisors is an integer number (830648).

Almost surely, 28670081 is an apocalyptic number.

It is an amenable number.

8670081 is a deficient number, since it is larger than the sum of its proper divisors (4620287).

8670081 is a wasteful number, since it uses less digits than its factorization.

8670081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 8670081 is about 2944.5001273561. The cubic root of 8670081 is about 205.4349756680.

The spelling of 8670081 in words is "eight million, six hundred seventy thousand, eighty-one".

Divisors: 1 3 7 21 181 543 1267 2281 3801 6843 15967 47901 412861 1238583 2890027 8670081