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68770208 = 2513165313
BaseRepresentation
bin1000001100101…
…01100110100000
311210101212222202
410012111212200
5120101121313
610453552332
71463352143
oct406254640
9153355882
1068770208
1135901091
121b0456a8
131132ab40
1491c205a
156086558
hex41959a0

68770208 has 24 divisors (see below), whose sum is σ = 145806948. Its totient is φ = 31739904.

The previous prime is 68770159. The next prime is 68770217. The reversal of 68770208 is 80207786.

It can be written as a sum of positive squares in 2 ways, for example, as 47720464 + 21049744 = 6908^2 + 4588^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82241 + ... + 83072.

Almost surely, 268770208 is an apocalyptic number.

It is an amenable number.

68770208 is an abundant number, since it is smaller than the sum of its proper divisors (77036740).

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

68770208 is a wasteful number, since it uses less digits than its factorization.

68770208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165336 (or 165328 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 68770208 is about 8292.7804746056. The cubic root of 68770208 is about 409.7007691725.

The spelling of 68770208 in words is "sixty-eight million, seven hundred seventy thousand, two hundred eight".

Divisors: 1 2 4 8 13 16 26 32 52 104 208 416 165313 330626 661252 1322504 2149069 2645008 4298138 5290016 8596276 17192552 34385104 68770208