Search a number
-
+
320664 = 23331431
BaseRepresentation
bin1001110010010011000
3121021212110
41032102120
540230124
610512320
72503611
oct1162230
9537773
10320664
111a9a13
121356a0
13b2c56
1484c08
1565029
hex4e498

320664 has 32 divisors (see below), whose sum is σ = 829440. Its totient is φ = 103200.

The previous prime is 320659. The next prime is 320669. The reversal of 320664 is 466023.

It is an interprime number because it is at equal distance from previous prime (320659) and next prime (320669).

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 320664.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320664.

It is not an unprimeable number, because it can be changed into a prime (320669) by changing a digit.

320664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (25920).

2320664 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 320664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414720).

320664 is an abundant number, since it is smaller than the sum of its proper divisors (508776).

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

320664 is a wasteful number, since it uses less digits than its factorization.

320664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 320664 is about 566.2720194394. The cubic root of 320664 is about 68.4463145170.

Adding to 320664 its reverse (466023), we get a palindrome (786687).

The spelling of 320664 in words is "three hundred twenty thousand, six hundred sixty-four".

Divisors: 1 2 3 4 6 8 12 24 31 62 93 124 186 248 372 431 744 862 1293 1724 2586 3448 5172 10344 13361 26722 40083 53444 80166 106888 160332 320664