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68150810 = 2571374891
BaseRepresentation
bin1000000111111…
…10011000011010
311202020102100002
410003332120122
5114421311220
610432413002
71455162260
oct403763032
9152212302
1068150810
1135518792
121a9a7162
1311171c30
1490a0430
155eb2c75
hex40fe61a

68150810 has 32 divisors (see below), whose sum is σ = 150982272. Its totient is φ = 21568320.

The previous prime is 68150801. The next prime is 68150827. The reversal of 68150810 is 1805186.

It is a super-2 number, since 2×681508102 = 9289065807312200, which contains 22 as substring.

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, 36536 + ... + 38355.

It is an arithmetic number, because the mean of its divisors is an integer number (4718196).

Almost surely, 268150810 is an apocalyptic number.

68150810 is an abundant number, since it is smaller than the sum of its proper divisors (82831462).

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

68150810 is a wasteful number, since it uses less digits than its factorization.

68150810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74918.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 68150810 is about 8255.3503862647. The cubic root of 68150810 is about 408.4670297545.

Adding to 68150810 its reverse (1805186), we get a palindrome (69955996).

The spelling of 68150810 in words is "sixty-eight million, one hundred fifty thousand, eight hundred ten".

Divisors: 1 2 5 7 10 13 14 26 35 65 70 91 130 182 455 910 74891 149782 374455 524237 748910 973583 1048474 1947166 2621185 4867915 5242370 6815081 9735830 13630162 34075405 68150810