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68147716 = 22713187219
BaseRepresentation
bin1000000111111…
…01101000000100
311202020021002111
410003331220010
5114421211331
610432350404
71455150250
oct403755004
9152207074
1068147716
113551642a
121a9a5404
13111706c0
14909d260
155eb1db1
hex40fda04

68147716 has 24 divisors (see below), whose sum is σ = 146780480. Its totient is φ = 26959392.

The previous prime is 68147711. The next prime is 68147719. The reversal of 68147716 is 61774186.

It is a super-2 number, since 2×681477162 = 9288222392033312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68147711) 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 7 ways as a sum of consecutive naturals, for example, 93246 + ... + 93973.

Almost surely, 268147716 is an apocalyptic number.

It is an amenable number.

68147716 is an abundant number, since it is smaller than the sum of its proper divisors (78632764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68147716 is a wasteful number, since it uses less digits than its factorization.

68147716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187243 (or 187241 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 68147716 is about 8255.1629905169. The cubic root of 68147716 is about 408.4608482867.

The spelling of 68147716 in words is "sixty-eight million, one hundred forty-seven thousand, seven hundred sixteen".

Divisors: 1 2 4 7 13 14 26 28 52 91 182 364 187219 374438 748876 1310533 2433847 2621066 4867694 5242132 9735388 17036929 34073858 68147716