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68050720 = 255425317
BaseRepresentation
bin1000000111001…
…01111100100000
311202001100001001
410003211330200
5114410110340
610430321344
71454264413
oct403457440
9152040031
1068050720
113545a571
121a959254
13111384ca
149075b7a
155e9329a
hex40e5f20

68050720 has 24 divisors (see below), whose sum is σ = 160770204. Its totient is φ = 27220224.

The previous prime is 68050699. The next prime is 68050727. The reversal of 68050720 is 2705086.

It can be written as a sum of positive squares in 2 ways, for example, as 67831696 + 219024 = 8236^2 + 468^2 .

It is not an unprimeable number, because it can be changed into a prime (68050727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212499 + ... + 212818.

Almost surely, 268050720 is an apocalyptic number.

It is an amenable number.

68050720 is an abundant number, since it is smaller than the sum of its proper divisors (92719484).

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

68050720 is a wasteful number, since it uses less digits than its factorization.

68050720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425332 (or 425324 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 68050720 is about 8249.2860297119. The cubic root of 68050720 is about 408.2669661216.

The spelling of 68050720 in words is "sixty-eight million, fifty thousand, seven hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 425317 850634 1701268 2126585 3402536 4253170 6805072 8506340 13610144 17012680 34025360 68050720