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668194288 = 24239174737
BaseRepresentation
bin100111110100111…
…101010111110000
31201120022210020121
4213310331113300
52332024204123
6150145420024
722362362206
oct4764752760
91646283217
10668194288
113131a6293
1216793a614
13a8584548
1464a59076
153d9dd75d
hex27d3d5f0

668194288 has 20 divisors (see below), whose sum is σ = 1300050720. Its totient is φ = 332697344.

The previous prime is 668194271. The next prime is 668194309. The reversal of 668194288 is 882491866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83545 + ... + 91192.

It is an arithmetic number, because the mean of its divisors is an integer number (65002536).

Almost surely, 2668194288 is an apocalyptic number.

It is an amenable number.

668194288 is a deficient number, since it is larger than the sum of its proper divisors (631856432).

668194288 is a wasteful number, since it uses less digits than its factorization.

668194288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174984 (or 174978 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 668194288 is about 25849.4543075865. The cubic root of 668194288 is about 874.2472058085.

The spelling of 668194288 in words is "six hundred sixty-eight million, one hundred ninety-four thousand, two hundred eighty-eight".

Divisors: 1 2 4 8 16 239 478 956 1912 3824 174737 349474 698948 1397896 2795792 41762143 83524286 167048572 334097144 668194288