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68688686 = 211191011627
BaseRepresentation
bin1000001100000…
…01101100101110
311210020202011102
410012001230232
5120041014221
610452123102
71462562363
oct406015456
9153222142
1068688686
1135855910
121b006492
13112cc9c1
1491a046a
15606c30b
hex4181b2e

68688686 has 32 divisors (see below), whose sum is σ = 119560320. Its totient is φ = 29268000.

The previous prime is 68688679. The next prime is 68688703.

68688686 = 1942 + 1952 + ... + 5972.

68688686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

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, 41405 + ... + 43031.

It is an arithmetic number, because the mean of its divisors is an integer number (3736260).

Almost surely, 268688686 is an apocalyptic number.

68688686 is a deficient number, since it is larger than the sum of its proper divisors (50871634).

68688686 is a wasteful number, since it uses less digits than its factorization.

68688686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its digits is 5308416, while the sum is 56.

The square root of 68688686 is about 8287.8637778381. The cubic root of 68688686 is about 409.5388151648.

The spelling of 68688686 in words is "sixty-eight million, six hundred eighty-eight thousand, six hundred eighty-six".

Divisors: 1 2 11 19 22 38 101 202 209 418 1111 1627 1919 2222 3254 3838 17897 21109 30913 35794 42218 61826 164327 328654 340043 680086 1807597 3122213 3615194 6244426 34344343 68688686