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68718806 = 2132991139
BaseRepresentation
bin1000001100010…
…01000011010110
311210022021110222
410012021003112
5120043000211
610452514342
71463046242
oct406110326
9153267428
1068718806
1135876502
121b01b9b2
1311310620
1491ab422
1560761db
hex41890d6

68718806 has 16 divisors (see below), whose sum is σ = 114836400. Its totient is φ = 30622368.

The previous prime is 68718799. The next prime is 68718809. The reversal of 68718806 is 60881786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68718809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44816 + ... + 46323.

It is an arithmetic number, because the mean of its divisors is an integer number (7177275).

Almost surely, 268718806 is an apocalyptic number.

68718806 is a deficient number, since it is larger than the sum of its proper divisors (46117594).

68718806 is a wasteful number, since it uses less digits than its factorization.

68718806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91183.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 68718806 is about 8289.6806934887. The cubic root of 68718806 is about 409.5986673630.

The spelling of 68718806 in words is "sixty-eight million, seven hundred eighteen thousand, eight hundred six".

Divisors: 1 2 13 26 29 58 377 754 91139 182278 1184807 2369614 2643031 5286062 34359403 68718806