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68969056 = 2513317523
BaseRepresentation
bin1000001110001…
…10001001100000
311210202222202111
410013012021200
5120124002211
610502125104
71465140652
oct407061140
9153688674
1068969056
1135a27522
121b120794
131139a4c0
1492346d2
1560c5421
hex41c6260

68969056 has 48 divisors (see below), whose sum is σ = 146969424. Its totient is φ = 31670784.

The previous prime is 68969041. The next prime is 68969057. The reversal of 68969056 is 65096986.

It is a super-2 number, since 2×689690562 = 9513461371062272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68969057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131611 + ... + 132133.

It is an arithmetic number, because the mean of its divisors is an integer number (3061863).

Almost surely, 268969056 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 68969056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73484712).

68969056 is an abundant number, since it is smaller than the sum of its proper divisors (78000368).

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

68969056 is a wasteful number, since it uses less digits than its factorization.

68969056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 68969056 is about 8304.7610441240. The cubic root of 68969056 is about 410.0952703453.

The spelling of 68969056 in words is "sixty-eight million, nine hundred sixty-nine thousand, fifty-six".

Divisors: 1 2 4 8 13 16 26 32 52 104 208 317 416 523 634 1046 1268 2092 2536 4121 4184 5072 6799 8242 8368 10144 13598 16484 16736 27196 32968 54392 65936 108784 131872 165791 217568 331582 663164 1326328 2155283 2652656 4310566 5305312 8621132 17242264 34484528 68969056