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68106830 = 25111932587
BaseRepresentation
bin1000000111100…
…11101001001110
311202011012000012
410003303221032
5114413404310
610431433222
71454620121
oct403635116
9152135005
1068106830
1135498740
121a985812
1311157bcc
14908c3b8
155ea4c05
hex40f3a4e

68106830 has 32 divisors (see below), whose sum is σ = 140780160. Its totient is φ = 23461920.

The previous prime is 68106817. The next prime is 68106847. The reversal of 68106830 is 3860186.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14204 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (4399380).

Almost surely, 268106830 is an apocalyptic number.

68106830 is an abundant number, since it is smaller than the sum of its proper divisors (72673330).

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

68106830 is a wasteful number, since it uses less digits than its factorization.

68106830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32624.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 68106830 is about 8252.6862293438. The cubic root of 68106830 is about 408.3791450290.

The spelling of 68106830 in words is "sixty-eight million, one hundred six thousand, eight hundred thirty".

Divisors: 1 2 5 10 11 19 22 38 55 95 110 190 209 418 1045 2090 32587 65174 162935 325870 358457 619153 716914 1238306 1792285 3095765 3584570 6191530 6810683 13621366 34053415 68106830