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68136426 = 2323785357
BaseRepresentation
bin1000000111110…
…10110111101010
311202012200121100
410003322313222
5114420331201
610432222230
71455102321
oct403726752
9152180540
1068136426
11355089a6
121a99a976
1311168517
1490990b8
155ead886
hex40fadea

68136426 has 12 divisors (see below), whose sum is σ = 147628962. Its totient is φ = 22712136.

The previous prime is 68136403. The next prime is 68136437. The reversal of 68136426 is 62463186.

68136426 is a `hidden beast` number, since 6 + 8 + 1 + 3 + 642 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 53275401 + 14861025 = 7299^2 + 3855^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1892661 + ... + 1892696.

Almost surely, 268136426 is an apocalyptic number.

68136426 is an abundant number, since it is smaller than the sum of its proper divisors (79492536).

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

68136426 is a wasteful number, since it uses less digits than its factorization.

68136426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785365 (or 3785362 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 68136426 is about 8254.4791477113. The cubic root of 68136426 is about 408.4382905355.

The spelling of 68136426 in words is "sixty-eight million, one hundred thirty-six thousand, four hundred twenty-six".

Divisors: 1 2 3 6 9 18 3785357 7570714 11356071 22712142 34068213 68136426