Search a number
-
+
331660 = 225723103
BaseRepresentation
bin1010000111110001100
3121211221201
41100332030
541103120
611035244
72550640
oct1207614
9554851
10331660
112071aa
1213bb24
13b7c64
1488c20
156840a
hex50f8c

331660 has 48 divisors (see below), whose sum is σ = 838656. Its totient is φ = 107712.

The previous prime is 331651. The next prime is 331663. The reversal of 331660 is 66133.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3169 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (17472).

2331660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419328).

331660 is an abundant number, since it is smaller than the sum of its proper divisors (506996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331660 is a wasteful number, since it uses less digits than its factorization.

331660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 331660 is about 575.8992967525. The cubic root of 331660 is about 69.2199102943.

Adding to 331660 its reverse (66133), we get a palindrome (397793).

The spelling of 331660 in words is "three hundred thirty-one thousand, six hundred sixty".

Divisors: 1 2 4 5 7 10 14 20 23 28 35 46 70 92 103 115 140 161 206 230 322 412 460 515 644 721 805 1030 1442 1610 2060 2369 2884 3220 3605 4738 7210 9476 11845 14420 16583 23690 33166 47380 66332 82915 165830 331660