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68148680 = 2351703717
BaseRepresentation
bin1000000111111…
…01110111001000
311202020022102012
410003331313020
5114421224210
610432355052
71455153125
oct403756710
9152208365
1068148680
1135517126
121a9a5a88
1311170c82
14909d74c
155eb2305
hex40fddc8

68148680 has 16 divisors (see below), whose sum is σ = 153334620. Its totient is φ = 27259456.

The previous prime is 68148677. The next prime is 68148697. The reversal of 68148680 is 8684186.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 20164 = 8254^2 + 142^2 .

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, 851819 + ... + 851898.

Almost surely, 268148680 is an apocalyptic number.

It is an amenable number.

68148680 is an abundant number, since it is smaller than the sum of its proper divisors (85185940).

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

68148680 is a wasteful number, since it uses less digits than its factorization.

68148680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703728 (or 1703724 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 68148680 is about 8255.2213780128. The cubic root of 68148680 is about 408.4627742716.

The spelling of 68148680 in words is "sixty-eight million, one hundred forty-eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 1703717 3407434 6814868 8518585 13629736 17037170 34074340 68148680