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67030285 = 572416673
BaseRepresentation
bin1111111110110…
…0110100001101
311200010111021011
43333230310031
5114124432120
610352405221
71442514400
oct377546415
9150114234
1067030285
1134922933
121a546811
1310b6bbba
148c8bd37
155d40c5a
hex3fecd0d

67030285 has 24 divisors (see below), whose sum is σ = 95865336. Its totient is φ = 44835840.

The previous prime is 67030247. The next prime is 67030289. The reversal of 67030285 is 58203076.

It can be written as a sum of positive squares in 4 ways, for example, as 4351396 + 62678889 = 2086^2 + 7917^2 .

It is not a de Polignac number, because 67030285 - 217 = 66899213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67030289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6709 + ... + 13381.

It is an arithmetic number, because the mean of its divisors is an integer number (3994389).

Almost surely, 267030285 is an apocalyptic number.

It is an amenable number.

67030285 is a deficient number, since it is larger than the sum of its proper divisors (28835051).

67030285 is a wasteful number, since it uses less digits than its factorization.

67030285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733 (or 6726 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 67030285 is about 8187.2025136795. The cubic root of 67030285 is about 406.2159968384.

The spelling of 67030285 in words is "sixty-seven million, thirty thousand, two hundred eighty-five".

Divisors: 1 5 7 35 41 49 205 245 287 1435 2009 6673 10045 33365 46711 233555 273593 326977 1367965 1634885 1915151 9575755 13406057 67030285