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68018260 = 22543139569
BaseRepresentation
bin1000000110111…
…10000001010100
311201222200111211
410003132001110
5114403041020
610425511204
71454100652
oct403360124
9151880454
1068018260
1135438142
121a942504
13111267bb
149067dd2
155e8885a
hex40de054

68018260 has 48 divisors (see below), whose sum is σ = 147470400. Its totient is φ = 26337024.

The previous prime is 68018257. The next prime is 68018263. The reversal of 68018260 is 6281086.

It is an interprime number because it is at equal distance from previous prime (68018257) and next prime (68018263).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68018263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119256 + ... + 119824.

It is an arithmetic number, because the mean of its divisors is an integer number (3072300).

Almost surely, 268018260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68018260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73735200).

68018260 is an abundant number, since it is smaller than the sum of its proper divisors (79452140).

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

68018260 is a wasteful number, since it uses less digits than its factorization.

68018260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 68018260 is about 8247.3183520463. The cubic root of 68018260 is about 408.2020417368.

The spelling of 68018260 in words is "sixty-eight million, eighteen thousand, two hundred sixty".

Divisors: 1 2 4 5 10 20 43 86 139 172 215 278 430 556 569 695 860 1138 1390 2276 2780 2845 5690 5977 11380 11954 23908 24467 29885 48934 59770 79091 97868 119540 122335 158182 244670 316364 395455 489340 790910 1581820 3400913 6801826 13603652 17004565 34009130 68018260