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68154680 = 23511154897
BaseRepresentation
bin1000000111111…
…11010100111000
311202020121122102
410003333110320
5114421422210
610432442532
71455206456
oct403772470
9152217572
1068154680
1135520690
121a9a9448
1311173919
1490a19d6
155eb3ea5
hex40ff538

68154680 has 32 divisors (see below), whose sum is σ = 167289840. Its totient is φ = 24783360.

The previous prime is 68154673. The next prime is 68154689. The reversal of 68154680 is 8645186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68154689) 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, 77009 + ... + 77888.

Almost surely, 268154680 is an apocalyptic number.

It is an amenable number.

68154680 is an abundant number, since it is smaller than the sum of its proper divisors (99135160).

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

68154680 is a wasteful number, since it uses less digits than its factorization.

68154680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154919 (or 154915 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 68154680 is about 8255.5847763802. The cubic root of 68154680 is about 408.4747613207.

The spelling of 68154680 in words is "sixty-eight million, one hundred fifty-four thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 11 20 22 40 44 55 88 110 220 440 154897 309794 619588 774485 1239176 1548970 1703867 3097940 3407734 6195880 6815468 8519335 13630936 17038670 34077340 68154680