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7668905 = 52952889
BaseRepresentation
bin11101010000010010101001
3112102121202112
4131100102221
53430401110
6432212105
7122120216
oct35202251
915377675
107668905
114368842
12269a035
13178681a
141038b0d
15a17405
hex7504a9

7668905 has 8 divisors (see below), whose sum is σ = 9520200. Its totient is φ = 5923456.

The previous prime is 7668901. The next prime is 7668911. The reversal of 7668905 is 5098667.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1338649 + 6330256 = 1157^2 + 2516^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7668905 - 22 = 7668901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7668901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26300 + ... + 26589.

It is an arithmetic number, because the mean of its divisors is an integer number (1190025).

Almost surely, 27668905 is an apocalyptic number.

It is an amenable number.

7668905 is a deficient number, since it is larger than the sum of its proper divisors (1851295).

7668905 is a wasteful number, since it uses less digits than its factorization.

7668905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52923.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 7668905 is about 2769.2787869769. The cubic root of 7668905 is about 197.2019110502.

The spelling of 7668905 in words is "seven million, six hundred sixty-eight thousand, nine hundred five".

Divisors: 1 5 29 145 52889 264445 1533781 7668905