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7680105 = 325170669
BaseRepresentation
bin11101010011000001101001
3112110012010100
4131103001221
53431230410
6432340013
7122164656
oct35230151
915405110
107680105
1143761a4
1226a4609
13178b954
14103cc2d
15a1a8c0
hex753069

7680105 has 12 divisors (see below), whose sum is σ = 13312260. Its totient is φ = 4096032.

The previous prime is 7680103. The next prime is 7680119. The reversal of 7680105 is 5010867.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 1687401 = 2448^2 + 1299^2 .

It is not a de Polignac number, because 7680105 - 21 = 7680103 is a prime.

It is a super-2 number, since 2×76801052 = 117968025622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7680103) 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 11 ways as a sum of consecutive naturals, for example, 85290 + ... + 85379.

It is an arithmetic number, because the mean of its divisors is an integer number (1109355).

Almost surely, 27680105 is an apocalyptic number.

It is an amenable number.

7680105 is a deficient number, since it is larger than the sum of its proper divisors (5632155).

7680105 is a wasteful number, since it uses less digits than its factorization.

7680105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170680 (or 170677 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 7680105 is about 2771.3002363512. The cubic root of 7680105 is about 197.2978650822.

The spelling of 7680105 in words is "seven million, six hundred eighty thousand, one hundred five".

Divisors: 1 3 5 9 15 45 170669 512007 853345 1536021 2560035 7680105