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68396508 = 22331737253
BaseRepresentation
bin1000001001110…
…10010111011100
311202200220101000
410010322113130
5120002142013
610441550300
71460234505
oct404722734
9152626330
1068396508
1135676344
121aaa5390
1311229a0b
149125bac
156010973
hex413a5dc

68396508 has 48 divisors (see below), whose sum is σ = 187760160. Its totient is φ = 21457152.

The previous prime is 68396483. The next prime is 68396533. The reversal of 68396508 is 80569386.

It is an interprime number because it is at equal distance from previous prime (68396483) and next prime (68396533).

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 15 ways as a sum of consecutive naturals, for example, 16791 + ... + 20462.

It is an arithmetic number, because the mean of its divisors is an integer number (3911670).

Almost surely, 268396508 is an apocalyptic number.

68396508 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68396508 is an abundant number, since it is smaller than the sum of its proper divisors (119363652).

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

68396508 is a wasteful number, since it uses less digits than its factorization.

68396508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37283 (or 37275 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 68396508 is about 8270.2181349708. The cubic root of 68396508 is about 408.9573108802.

The spelling of 68396508 in words is "sixty-eight million, three hundred ninety-six thousand, five hundred eight".

Divisors: 1 2 3 4 6 9 12 17 18 27 34 36 51 54 68 102 108 153 204 306 459 612 918 1836 37253 74506 111759 149012 223518 335277 447036 633301 670554 1005831 1266602 1341108 1899903 2011662 2533204 3799806 4023324 5699709 7599612 11399418 17099127 22798836 34198254 68396508