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68869160 = 2351721729
BaseRepresentation
bin1000001101011…
…01110000101000
311210120220201122
410012231300220
5120112303120
610500034412
71464243503
oct406556050
9153526648
1068869160
1135969468
121b092a08
1311363ba9
14920a13a
1560a5a25
hex41adc28

68869160 has 16 divisors (see below), whose sum is σ = 154955700. Its totient is φ = 27547648.

The previous prime is 68869139. The next prime is 68869169. The reversal of 68869160 is 6196886.

It can be written as a sum of positive squares in 2 ways, for example, as 67601284 + 1267876 = 8222^2 + 1126^2 .

It is a super-2 number, since 2×688691602 = 9485922398211200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68869169) 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 3 ways as a sum of consecutive naturals, for example, 860825 + ... + 860904.

Almost surely, 268869160 is an apocalyptic number.

It is an amenable number.

68869160 is an abundant number, since it is smaller than the sum of its proper divisors (86086540).

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

68869160 is a wasteful number, since it uses less digits than its factorization.

68869160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721740 (or 1721736 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 68869160 is about 8298.7444833541. The cubic root of 68869160 is about 409.8971782612.

The spelling of 68869160 in words is "sixty-eight million, eight hundred sixty-nine thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 1721729 3443458 6886916 8608645 13773832 17217290 34434580 68869160