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68794815 = 3529167947
BaseRepresentation
bin1000001100110…
…11100110111111
311210110010202010
410012123212333
5120102413230
610454302303
71463513655
oct406334677
9153403663
1068794815
1135918621
121b057993
13113390bb
1491cadd5
15608d9b0
hex419b9bf

68794815 has 32 divisors (see below), whose sum is σ = 114670080. Its totient is φ = 35176064.

The previous prime is 68794813. The next prime is 68794819. The reversal of 68794815 is 51849786.

It is a cyclic number.

It is not a de Polignac number, because 68794815 - 21 = 68794813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68794813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72172 + ... + 73118.

It is an arithmetic number, because the mean of its divisors is an integer number (3583440).

Almost surely, 268794815 is an apocalyptic number.

68794815 is a deficient number, since it is larger than the sum of its proper divisors (45875265).

68794815 is a wasteful number, since it uses less digits than its factorization.

68794815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its digits is 483840, while the sum is 48.

The square root of 68794815 is about 8294.2639818130. The cubic root of 68794815 is about 409.7496290152.

The spelling of 68794815 in words is "sixty-eight million, seven hundred ninety-four thousand, eight hundred fifteen".

Divisors: 1 3 5 15 29 87 145 167 435 501 835 947 2505 2841 4735 4843 14205 14529 24215 27463 72645 82389 137315 158149 411945 474447 790745 2372235 4586321 13758963 22931605 68794815