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68580620 = 225109163193
BaseRepresentation
bin1000001011001…
…11010100001100
311210001020220222
410011213110030
5120024034440
610445530512
71461632333
oct405472414
9153036828
1068580620
11357916a9
121ab73a38
1311292764
149172d1a
15604a2b5
hex416750c

68580620 has 48 divisors (see below), whose sum is σ = 146989920. Its totient is φ = 26873856.

The previous prime is 68580613. The next prime is 68580623. The reversal of 68580620 is 2608586.

It is not an unprimeable number, because it can be changed into a prime (68580623) 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 15 ways as a sum of consecutive naturals, for example, 355244 + ... + 355436.

It is an arithmetic number, because the mean of its divisors is an integer number (3062290).

Almost surely, 268580620 is an apocalyptic number.

It is an amenable number.

68580620 is an abundant number, since it is smaller than the sum of its proper divisors (78409300).

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

68580620 is a wasteful number, since it uses less digits than its factorization.

68580620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 68580620 is about 8281.3416787378. The cubic root of 68580620 is about 409.3239304240.

The spelling of 68580620 in words is "sixty-eight million, five hundred eighty thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 109 163 193 218 326 386 436 545 652 772 815 965 1090 1630 1930 2180 3260 3860 17767 21037 31459 35534 42074 62918 71068 84148 88835 105185 125836 157295 177670 210370 314590 355340 420740 629180 3429031 6858062 13716124 17145155 34290310 68580620