Base | Representation |
---|---|
bin | 10100100101101010000 |
3 | 1021021102200 |
4 | 2210231100 |
5 | 133042030 |
6 | 22243200 |
7 | 5506611 |
oct | 2445520 |
9 | 1237380 |
10 | 674640 |
11 | 42095a |
12 | 286500 |
13 | 1a80c5 |
14 | 137c08 |
15 | d4d60 |
hex | a4b50 |
674640 has 60 divisors (see below), whose sum is σ = 2268084. Its totient is φ = 179712.
The previous prime is 674603. The next prime is 674647. The reversal of 674640 is 46476.
It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 553536 = 348^2 + 744^2 .
It is a tau number, because it is divible by the number of its divisors (60).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (674647) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252 + ... + 1188.
2674640 is an apocalyptic number.
674640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 674640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134042).
674640 is an abundant number, since it is smaller than the sum of its proper divisors (1593444).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
674640 is a wasteful number, since it uses less digits than its factorization.
674640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 956 (or 947 counting only the distinct ones).
The product of its (nonzero) digits is 4032, while the sum is 27.
The square root of 674640 is about 821.3647180151. The cubic root of 674640 is about 87.7049346119.
It can be divided in two parts, 6746 and 40, that added together give a triangular number (6786 = T116).
The spelling of 674640 in words is "six hundred seventy-four thousand, six hundred forty".
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