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168211844 = 2242052961
BaseRepresentation
bin10100000011010…
…11010110000100
3102201112001021022
422001223112010
5321030234334
624405210312
74111530353
oct1201532604
9381461238
10168211844
1186a51059
1248400998
1328b07448
14184a999a
15eb7a82e
hexa06b584

168211844 has 6 divisors (see below), whose sum is σ = 294370734. Its totient is φ = 84105920.

The previous prime is 168211843. The next prime is 168211853. The reversal of 168211844 is 448112861.

It is a happy number.

168211844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 119071744 + 49140100 = 10912^2 + 7010^2 .

It is not an unprimeable number, because it can be changed into a prime (168211843) 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 as a sum of consecutive naturals, namely, 21026477 + ... + 21026484.

It is an arithmetic number, because the mean of its divisors is an integer number (49061789).

Almost surely, 2168211844 is an apocalyptic number.

It is an amenable number.

168211844 is a deficient number, since it is larger than the sum of its proper divisors (126158890).

168211844 is a wasteful number, since it uses less digits than its factorization.

168211844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42052965 (or 42052963 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 168211844 is about 12969.6508819629. The cubic root of 168211844 is about 552.0166670386.

The spelling of 168211844 in words is "one hundred sixty-eight million, two hundred eleven thousand, eight hundred forty-four".

Divisors: 1 2 4 42052961 84105922 168211844