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68238885 = 351113291097
BaseRepresentation
bin1000001000100…
…11111000100101
311202101220011010
410010103320211
5114432121020
610434332433
71456010121
oct404237045
9152356133
1068238885
1135578980
121aa2a119
13111a3050
1490c4581
155ecdde0
hex4113e25

68238885 has 64 divisors (see below), whose sum is σ = 132814080. Its totient is φ = 29460480.

The previous prime is 68238851. The next prime is 68238913. The reversal of 68238885 is 58883286.

It is not a de Polignac number, because 68238885 - 27 = 68238757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61657 + ... + 62753.

It is an arithmetic number, because the mean of its divisors is an integer number (2075220).

Almost surely, 268238885 is an apocalyptic number.

68238885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68238885 is a deficient number, since it is larger than the sum of its proper divisors (64575195).

68238885 is a wasteful number, since it uses less digits than its factorization.

68238885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its digits is 737280, while the sum is 48.

The square root of 68238885 is about 8260.6830831354. The cubic root of 68238885 is about 408.6429153968.

The spelling of 68238885 in words is "sixty-eight million, two hundred thirty-eight thousand, eight hundred eighty-five".

Divisors: 1 3 5 11 13 15 29 33 39 55 65 87 143 145 165 195 319 377 429 435 715 957 1097 1131 1595 1885 2145 3291 4147 4785 5485 5655 12067 12441 14261 16455 20735 31813 36201 42783 60335 62205 71305 95439 156871 159065 181005 213915 349943 413569 470613 477195 784355 1049829 1240707 1749715 2067845 2353065 4549259 5249145 6203535 13647777 22746295 68238885