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70868680 = 2351771717
BaseRepresentation
bin1000011100101…
…01111011001000
311221100111112221
410032111323020
5121120244210
611010543424
71520242141
oct416257310
9157314487
1070868680
1137004763
121b897b74
13118b403c
1495aaac8
15634d1da
hex4395ec8

70868680 has 16 divisors (see below), whose sum is σ = 159454620. Its totient is φ = 28347456.

The previous prime is 70868671. The next prime is 70868683. The reversal of 70868680 is 8686807.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65966884 + 4901796 = 8122^2 + 2214^2 .

It is not an unprimeable number, because it can be changed into a prime (70868683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 885819 + ... + 885898.

Almost surely, 270868680 is an apocalyptic number.

It is an amenable number.

70868680 is an abundant number, since it is smaller than the sum of its proper divisors (88585940).

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

70868680 is a wasteful number, since it uses less digits than its factorization.

70868680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771728 (or 1771724 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 70868680 is about 8418.3537583069. The cubic root of 70868680 is about 413.8263252797.

The spelling of 70868680 in words is "seventy million, eight hundred sixty-eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 1771717 3543434 7086868 8858585 14173736 17717170 35434340 70868680