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68247580 = 2258341113
BaseRepresentation
bin1000001000101…
…10000000011100
311202102100002011
410010112000130
5114432410310
610434441004
71456044352
oct404260034
9152370064
1068247580
1135584465
121aa33164
13111a6cab
1490c77d2
155ed178a
hex411601c

68247580 has 24 divisors (see below), whose sum is σ = 145050192. Its totient is φ = 26969472.

The previous prime is 68247559. The next prime is 68247587. The reversal of 68247580 is 8574286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68247587) 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, 18897 + ... + 22216.

It is an arithmetic number, because the mean of its divisors is an integer number (6043758).

Almost surely, 268247580 is an apocalyptic number.

It is an amenable number.

68247580 is an abundant number, since it is smaller than the sum of its proper divisors (76802612).

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

68247580 is a wasteful number, since it uses less digits than its factorization.

68247580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41205 (or 41203 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 68247580 is about 8261.2093545679. The cubic root of 68247580 is about 408.6602710890.

The spelling of 68247580 in words is "sixty-eight million, two hundred forty-seven thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 83 166 332 415 830 1660 41113 82226 164452 205565 411130 822260 3412379 6824758 13649516 17061895 34123790 68247580