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68280741 = 3250315083
BaseRepresentation
bin1000001000111…
…10000110100101
311202111000120100
410010132012211
5114434440431
610435254313
71456243134
oct404360645
9152430510
1068280741
11355a7371
121aa4a399
13111b9109
1490d591b
155edb4e6
hex411e1a5

68280741 has 12 divisors (see below), whose sum is σ = 98830368. Its totient is φ = 45426984.

The previous prime is 68280739. The next prime is 68280757. The reversal of 68280741 is 14708286.

It is not a de Polignac number, because 68280741 - 21 = 68280739 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68280696 and 68280705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68280731) 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 11 ways as a sum of consecutive naturals, for example, 3015 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (8235864).

Almost surely, 268280741 is an apocalyptic number.

It is an amenable number.

68280741 is a deficient number, since it is larger than the sum of its proper divisors (30549627).

68280741 is a wasteful number, since it uses less digits than its factorization.

68280741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15592 (or 15589 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 68280741 is about 8263.2161414306. The cubic root of 68280741 is about 408.7264487174.

The spelling of 68280741 in words is "sixty-eight million, two hundred eighty thousand, seven hundred forty-one".

Divisors: 1 3 9 503 1509 4527 15083 45249 135747 7586749 22760247 68280741