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67872620 = 2257574483
BaseRepresentation
bin1000000101110…
…10011101101100
311201201021201202
410002322131230
5114333410440
610422425032
71452623234
oct402723554
9151637652
1067872620
1135348782
121a892178
13110a541a
14902acc4
155e5a615
hex40ba76c

67872620 has 24 divisors (see below), whose sum is σ = 142752624. Its totient is φ = 27107136.

The previous prime is 67872601. The next prime is 67872631. The reversal of 67872620 is 2627876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12899 + ... + 17381.

It is an arithmetic number, because the mean of its divisors is an integer number (5948026).

Almost surely, 267872620 is an apocalyptic number.

It is an amenable number.

67872620 is an abundant number, since it is smaller than the sum of its proper divisors (74880004).

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

67872620 is a wasteful number, since it uses less digits than its factorization.

67872620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249 (or 5247 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 67872620 is about 8238.4840838591. The cubic root of 67872620 is about 407.9104875397.

The spelling of 67872620 in words is "sixty-seven million, eight hundred seventy-two thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 757 1514 3028 3785 4483 7570 8966 15140 17932 22415 44830 89660 3393631 6787262 13574524 16968155 33936310 67872620