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68201982 = 23219474243
BaseRepresentation
bin1000001000010…
…10110111111110
311202100000112100
410010022313332
5114424430412
610433445530
71455464412
oct404126776
9152300470
1068201982
1135553182
121aa108a6
131118c304
1490b4d42
155ec2edc
hex410adfe

68201982 has 48 divisors (see below), whose sum is σ = 158895360. Its totient is φ = 21074256.

The previous prime is 68201981. The next prime is 68202041. The reversal of 68201982 is 28910286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68201981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13953 + ... + 18195.

It is an arithmetic number, because the mean of its divisors is an integer number (3310320).

Almost surely, 268201982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68201982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79447680).

68201982 is an abundant number, since it is smaller than the sum of its proper divisors (90693378).

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

68201982 is a wasteful number, since it uses less digits than its factorization.

68201982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317 (or 4314 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68201982 is about 8258.4491280143. The cubic root of 68201982 is about 408.5692385935.

The spelling of 68201982 in words is "sixty-eight million, two hundred one thousand, nine hundred eighty-two".

Divisors: 1 2 3 6 9 18 19 38 47 57 94 114 141 171 282 342 423 846 893 1786 2679 4243 5358 8037 8486 12729 16074 25458 38187 76374 80617 161234 199421 241851 398842 483702 598263 725553 1196526 1451106 1794789 3589578 3788999 7577998 11366997 22733994 34100991 68201982