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68094980 = 22510613209
BaseRepresentation
bin1000000111100…
…00110000000100
311202010120202022
410003300300010
5114413014410
610431302312
71454540432
oct403606004
9152116668
1068094980
113548a848
121a97a998
13111526b5
149087d52
155ea1455
hex40f0c04

68094980 has 24 divisors (see below), whose sum is σ = 143178840. Its totient is φ = 27203840.

The previous prime is 68094953. The next prime is 68094989. The reversal of 68094980 is 8949086.

It can be written as a sum of positive squares in 4 ways, for example, as 12054784 + 56040196 = 3472^2 + 7486^2 .

It is not an unprimeable number, because it can be changed into a prime (68094989) 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, 19616 + ... + 22824.

It is an arithmetic number, because the mean of its divisors is an integer number (5965785).

Almost surely, 268094980 is an apocalyptic number.

It is an amenable number.

68094980 is an abundant number, since it is smaller than the sum of its proper divisors (75083860).

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

68094980 is a wasteful number, since it uses less digits than its factorization.

68094980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 68094980 is about 8251.9682500601. The cubic root of 68094980 is about 408.3554588409.

The spelling of 68094980 in words is "sixty-eight million, ninety-four thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 1061 2122 3209 4244 5305 6418 10610 12836 16045 21220 32090 64180 3404749 6809498 13618996 17023745 34047490 68094980