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68195088 = 24331312143
BaseRepresentation
bin1000001000010…
…01001100010000
311202022200002000
410010021030100
5114424220323
610433354000
71455435333
oct404111420
9152280060
1068195088
1135548a85
121aa08900
1311189130
1490b261a
155ec0e43
hex4109310

68195088 has 80 divisors (see below), whose sum is σ = 210819840. Its totient is φ = 20981376.

The previous prime is 68195077. The next prime is 68195117. The reversal of 68195088 is 88059186.

It is a super-3 number, since 3×681950883 (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 456 + ... + 11687.

It is an arithmetic number, because the mean of its divisors is an integer number (2635248).

Almost surely, 268195088 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 68195088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105409920).

68195088 is an abundant number, since it is smaller than the sum of its proper divisors (142624752).

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

68195088 is a wasteful number, since it uses less digits than its factorization.

68195088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12173 (or 12161 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 68195088 is about 8258.0317267494. The cubic root of 68195088 is about 408.5554717832. Note that the first 3 decimals are identical.

The spelling of 68195088 in words is "sixty-eight million, one hundred ninety-five thousand, eighty-eight".

Divisors: 1 2 3 4 6 8 9 12 13 16 18 24 26 27 36 39 48 52 54 72 78 104 108 117 144 156 208 216 234 312 351 432 468 624 702 936 1404 1872 2808 5616 12143 24286 36429 48572 72858 97144 109287 145716 157859 194288 218574 291432 315718 327861 437148 473577 582864 631436 655722 874296 947154 1262872 1311444 1420731 1748592 1894308 2525744 2622888 2841462 3788616 4262193 5245776 5682924 7577232 8524386 11365848 17048772 22731696 34097544 68195088