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68169180 = 22351136153
BaseRepresentation
bin1000001000000…
…10110111011100
311202021100112110
410010002313130
5114422403210
610433034020
71455266652
oct404026734
9152240473
1068169180
1135530572
121a9b5910
131117a3c1
1490a6dd2
155eb8420
hex4102ddc

68169180 has 24 divisors (see below), whose sum is σ = 190873872. Its totient is φ = 18178432.

The previous prime is 68169163. The next prime is 68169181. The reversal of 68169180 is 8196186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68169181) 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, 568017 + ... + 568136.

It is an arithmetic number, because the mean of its divisors is an integer number (7953078).

Almost surely, 268169180 is an apocalyptic number.

68169180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68169180 is an abundant number, since it is smaller than the sum of its proper divisors (122704692).

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

68169180 is a wasteful number, since it uses less digits than its factorization.

68169180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136165 (or 1136163 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 68169180 is about 8256.4629230682. The cubic root of 68169180 is about 408.5037271186.

The spelling of 68169180 in words is "sixty-eight million, one hundred sixty-nine thousand, one hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 1136153 2272306 3408459 4544612 5680765 6816918 11361530 13633836 17042295 22723060 34084590 68169180