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168669284 = 2276789909
BaseRepresentation
bin10100000110110…
…11000001100100
3102202101021202112
422003123001210
5321134404114
624423100152
74115444120
oct1203330144
9382337675
10168669284
1187233803
12485a1658
1328c37714
1418588580
15ec1b13e
hexa0db064

168669284 has 24 divisors (see below), whose sum is σ = 342377280. Its totient is φ = 71207136.

The previous prime is 168669283. The next prime is 168669287. The reversal of 168669284 is 482966861.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (168669283) 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, 43079 + ... + 46830.

It is an arithmetic number, because the mean of its divisors is an integer number (14265720).

Almost surely, 2168669284 is an apocalyptic number.

168669284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

168669284 is an abundant number, since it is smaller than the sum of its proper divisors (173707996).

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

168669284 is a wasteful number, since it uses less digits than its factorization.

168669284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89987 (or 89985 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 168669284 is about 12987.2739248851. The cubic root of 168669284 is about 552.5166039931.

The spelling of 168669284 in words is "one hundred sixty-eight million, six hundred sixty-nine thousand, two hundred eighty-four".

Divisors: 1 2 4 7 14 28 67 134 268 469 938 1876 89909 179818 359636 629363 1258726 2517452 6023903 12047806 24095612 42167321 84334642 168669284