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68284985 = 561922063
BaseRepresentation
bin1000001000111…
…11001000111001
311202111020101112
410010133020321
5114440104420
610435330105
71456261406
oct404371071
9152436345
1068284985
11355aa57a
121aa50935
13111bb022
1490d72ad
155edc8c5
hex411f239

68284985 has 8 divisors (see below), whose sum is σ = 82078080. Its totient is φ = 54537264.

The previous prime is 68284981. The next prime is 68284987. The reversal of 68284985 is 58948286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68284985 - 22 = 68284981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68284981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7937 + ... + 14126.

It is an arithmetic number, because the mean of its divisors is an integer number (10259760).

Almost surely, 268284985 is an apocalyptic number.

It is an amenable number.

68284985 is a deficient number, since it is larger than the sum of its proper divisors (13793095).

68284985 is a wasteful number, since it uses less digits than its factorization.

68284985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22687.

The product of its digits is 1105920, while the sum is 50.

The square root of 68284985 is about 8263.4729381780. The cubic root of 68284985 is about 408.7349166938.

The spelling of 68284985 in words is "sixty-eight million, two hundred eighty-four thousand, nine hundred eighty-five".

Divisors: 1 5 619 3095 22063 110315 13656997 68284985