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68363860 = 2253418193
BaseRepresentation
bin1000001001100…
…10011001010100
311202122020120211
410010302121110
5120000120420
610441135204
71460040355
oct404623124
9152566524
1068363860
1135653864
121aa8a504
1311217bb6
149117d2c
156005e5a
hex4132654

68363860 has 12 divisors (see below), whose sum is σ = 143564148. Its totient is φ = 27345536.

The previous prime is 68363857. The next prime is 68363861. The reversal of 68363860 is 6836386.

It can be written as a sum of positive squares in 2 ways, for example, as 44568976 + 23794884 = 6676^2 + 4878^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68363861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709077 + ... + 1709116.

It is an arithmetic number, because the mean of its divisors is an integer number (11963679).

Almost surely, 268363860 is an apocalyptic number.

It is an amenable number.

68363860 is an abundant number, since it is smaller than the sum of its proper divisors (75200288).

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

68363860 is a wasteful number, since it uses less digits than its factorization.

68363860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418202 (or 3418200 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 68363860 is about 8268.2440699341. The cubic root of 68363860 is about 408.8922307387.

The spelling of 68363860 in words is "sixty-eight million, three hundred sixty-three thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 3418193 6836386 13672772 17090965 34181930 68363860