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9440 = 25559
BaseRepresentation
bin10010011100000
3110221122
42103200
5300230
6111412
736344
oct22340
913848
109440
117102
125568
1343b2
143624
152be5
hex24e0

9440 has 24 divisors (see below), whose sum is σ = 22680. Its totient is φ = 3712.

The previous prime is 9439. The next prime is 9461. The reversal of 9440 is 449.

It is a super-2 number, since 2×94402 = 178227200, which contains 22 as substring.

It is a plaindrome in base 12.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 189.

It is an arithmetic number, because the mean of its divisors is an integer number (945).

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11340).

9440 is an abundant number, since it is smaller than the sum of its proper divisors (13240).

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

9440 is a wasteful number, since it uses less digits than its factorization.

9440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 9440 is about 97.1596624119. The cubic root of 9440 is about 21.1344361052.

Adding to 9440 its reverse (449), we get a palindrome (9889).

The spelling of 9440 in words is "nine thousand, four hundred forty".

Divisors: 1 2 4 5 8 10 16 20 32 40 59 80 118 160 236 295 472 590 944 1180 1888 2360 4720 9440