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68793816 = 23371322423
BaseRepresentation
bin1000001100110…
…11010111011000
311210110002101010
410012123113120
5120102400231
610454253520
71463511030
oct406332730
9153402333
1068793816
11359178a3
121b0572a0
1311338800
1491ca8c0
15608d546
hex419b5d8

68793816 has 96 divisors (see below), whose sum is σ = 212924160. Its totient is φ = 18135936.

The previous prime is 68793799. The next prime is 68793847. The reversal of 68793816 is 61839786.

It is a zygodrome in base 13.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 27181 + ... + 29603.

It is an arithmetic number, because the mean of its divisors is an integer number (2217960).

Almost surely, 268793816 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 68793816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106462080).

68793816 is an abundant number, since it is smaller than the sum of its proper divisors (144130344).

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

68793816 is a wasteful number, since it uses less digits than its factorization.

68793816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2448 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 68793816 is about 8294.2037592526. The cubic root of 68793816 is about 409.7476456203.

The spelling of 68793816 in words is "sixty-eight million, seven hundred ninety-three thousand, eight hundred sixteen".

Divisors: 1 2 3 4 6 7 8 12 13 14 21 24 26 28 39 42 52 56 78 84 91 104 156 168 169 182 273 312 338 364 507 546 676 728 1014 1092 1183 1352 2028 2184 2366 2423 3549 4056 4732 4846 7098 7269 9464 9692 14196 14538 16961 19384 28392 29076 31499 33922 50883 58152 62998 67844 94497 101766 125996 135688 188994 203532 220493 251992 377988 407064 409487 440986 661479 755976 818974 881972 1228461 1322958 1637948 1763944 2456922 2645916 2866409 3275896 4913844 5291832 5732818 8599227 9827688 11465636 17198454 22931272 34396908 68793816