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3440 = 24543
BaseRepresentation
bin110101110000
311201102
4311300
5102230
623532
713013
oct6560
94642
103440
112648
121ba8
131748
14137a
151045
hexd70

3440 has 20 divisors (see below), whose sum is σ = 8184. Its totient is φ = 1344.

The previous prime is 3433. The next prime is 3449. The reversal of 3440 is 443.

Adding to 3440 its reverse (443), we get a palindrome (3883).

3440 is nontrivially palindromic in base 6.

3440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a plaindrome in base 14.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59 + ... + 101.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4092).

3440 is an abundant number, since it is smaller than the sum of its proper divisors (4744).

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

3440 is a wasteful number, since it uses less digits than its factorization.

3440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 3440 is about 58.6515131945. The cubic root of 3440 is about 15.0956846286.

The spelling of 3440 in words is "three thousand, four hundred forty", and thus it is an iban number.

Divisors: 1 2 4 5 8 10 16 20 40 43 80 86 172 215 344 430 688 860 1720 3440