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68180982 = 23171993359
BaseRepresentation
bin1000001000001…
…01101111110110
311202021221201120
410010011233312
5114423242412
610433204410
71455346242
oct404055766
9152257646
1068180982
1135539421
121aa00706
131118289c
1490ab422
155ebbb8c
hex4105bf6

68180982 has 32 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 21276288.

The previous prime is 68180969. The next prime is 68181007. The reversal of 68180982 is 28908186.

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, 18619 + ... + 21977.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 268180982 is an apocalyptic number.

68180982 is an abundant number, since it is smaller than the sum of its proper divisors (76971018).

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

68180982 is a wasteful number, since it uses less digits than its factorization.

68180982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 68180982 is about 8257.1776049689. The cubic root of 68180982 is about 408.5273002484.

The spelling of 68180982 in words is "sixty-eight million, one hundred eighty thousand, nine hundred eighty-two".

Divisors: 1 2 3 6 17 34 51 102 199 398 597 1194 3359 3383 6718 6766 10077 10149 20154 20298 57103 114206 171309 342618 668441 1336882 2005323 4010646 11363497 22726994 34090491 68180982