Search a number
-
+
77689906 = 27233143181
BaseRepresentation
bin1001010000101…
…11010000110010
312102012001111221
410220113100302
5124342034111
611413055254
71632232120
oct450272062
9172161457
1077689906
113a943638
122202752a
1313131a78
14a464910
156c49371
hex4a17432

77689906 has 64 divisors (see below), whose sum is σ = 147603456. Its totient is φ = 29937600.

The previous prime is 77689897. The next prime is 77689939. The reversal of 77689906 is 60998677.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429136 + ... + 429316.

It is an arithmetic number, because the mean of its divisors is an integer number (2306304).

Almost surely, 277689906 is an apocalyptic number.

77689906 is a deficient number, since it is larger than the sum of its proper divisors (69913550).

77689906 is a wasteful number, since it uses less digits than its factorization.

77689906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 77689906 is about 8814.1877674576. The cubic root of 77689906 is about 426.6989085607.

The spelling of 77689906 in words is "seventy-seven million, six hundred eighty-nine thousand, nine hundred six".

Divisors: 1 2 7 14 23 31 43 46 62 86 161 181 217 301 322 362 434 602 713 989 1267 1333 1426 1978 2534 2666 4163 4991 5611 6923 7783 8326 9331 9982 11222 13846 15566 18662 29141 30659 39277 54481 58282 61318 78554 108962 129053 179009 214613 241273 258106 358018 429226 482546 903371 1253063 1688911 1806742 2506126 3377822 5549279 11098558 38844953 77689906