Base | Representation |
---|---|
bin | 101000100101000… |
… | …101101101110100 |
3 | 1202110001210122022 |
4 | 220211011231310 |
5 | 2343241431010 |
6 | 151320052312 |
7 | 22604541554 |
oct | 5045055564 |
9 | 1673053568 |
10 | 680811380 |
11 | 31a333737 |
12 | 170004098 |
13 | ab081392 |
14 | 665c1164 |
15 | 3eb81d55 |
hex | 28945b74 |
680811380 has 12 divisors (see below), whose sum is σ = 1429703940. Its totient is φ = 272324544.
The previous prime is 680811371. The next prime is 680811413. The reversal of 680811380 is 83118086.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 404653456 + 276157924 = 20116^2 + 16618^2 .
It is a self number, because there is not a number n which added to its sum of digits gives 680811380.
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, 17020265 + ... + 17020304.
It is an arithmetic number, because the mean of its divisors is an integer number (119141995).
Almost surely, 2680811380 is an apocalyptic number.
It is an amenable number.
680811380 is an abundant number, since it is smaller than the sum of its proper divisors (748892560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
680811380 is a wasteful number, since it uses less digits than its factorization.
680811380 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 34040578 (or 34040576 counting only the distinct ones).
The product of its (nonzero) digits is 9216, while the sum is 35.
The square root of 680811380 is about 26092.3624840680. The cubic root of 680811380 is about 879.7155502825.
The spelling of 680811380 in words is "six hundred eighty million, eight hundred eleven thousand, three hundred eighty".
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