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68223260 = 22571373557
BaseRepresentation
bin1000001000100…
…00000100011100
311202101002201102
410010100010130
5114431121020
610434132232
71455613430
oct404200434
9152332642
1068223260
1135568166
121aa21078
1311198bc1
1490bc9c0
155ec9475
hex411011c

68223260 has 48 divisors (see below), whose sum is σ = 164977344. Its totient is φ = 23213568.

The previous prime is 68223203. The next prime is 68223269. The reversal of 68223260 is 6232286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68223269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17402 + ... + 20958.

It is an arithmetic number, because the mean of its divisors is an integer number (3437028).

Almost surely, 268223260 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 68223260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82488672).

68223260 is an abundant number, since it is smaller than the sum of its proper divisors (96754084).

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

68223260 is a wasteful number, since it uses less digits than its factorization.

68223260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710 (or 3708 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 68223260 is about 8259.7372839576. The cubic root of 68223260 is about 408.6117233428.

The spelling of 68223260 in words is "sixty-eight million, two hundred twenty-three thousand, two hundred sixty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 137 140 274 548 685 959 1370 1918 2740 3557 3836 4795 7114 9590 14228 17785 19180 24899 35570 49798 71140 99596 124495 248990 487309 497980 974618 1949236 2436545 3411163 4873090 6822326 9746180 13644652 17055815 34111630 68223260