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67745080 = 23513130279
BaseRepresentation
bin1000000100110…
…11010100111000
311201110210210001
410002123110320
5114320320310
610420002344
71451552344
oct402332470
9151423701
1067745080
1135270977
121a8303b4
131105c360
148dd6624
155e3293a
hex409b538

67745080 has 32 divisors (see below), whose sum is σ = 164152800. Its totient is φ = 25013376.

The previous prime is 67745071. The next prime is 67745087. The reversal of 67745080 is 8054776.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67745087) 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, 64620 + ... + 65659.

It is an arithmetic number, because the mean of its divisors is an integer number (5129775).

Almost surely, 267745080 is an apocalyptic number.

It is an amenable number.

67745080 is an abundant number, since it is smaller than the sum of its proper divisors (96407720).

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

67745080 is a wasteful number, since it uses less digits than its factorization.

67745080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130303 (or 130299 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 67745080 is about 8230.7399424353. The cubic root of 67745080 is about 407.6548246797.

The spelling of 67745080 in words is "sixty-seven million, seven hundred forty-five thousand, eighty".

Divisors: 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 130279 260558 521116 651395 1042232 1302790 1693627 2605580 3387254 5211160 6774508 8468135 13549016 16936270 33872540 67745080