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43040 = 255269
BaseRepresentation
bin1010100000100000
32012001002
422200200
52334130
6531132
7236324
oct124040
965032
1043040
112a378
1220aa8
131678a
1411984
15cb45
hexa820

43040 has 24 divisors (see below), whose sum is σ = 102060. Its totient is φ = 17152.

The previous prime is 43037. The next prime is 43049. The reversal of 43040 is 4034.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 4624 = 196^2 + 68^2 .

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 43040.

It is not an unprimeable number, because it can be changed into a prime (43049) 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, 26 + ... + 294.

243040 is an apocalyptic number.

43040 is a gapful number since it is divisible by the number (40) 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 43040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51030).

43040 is an abundant number, since it is smaller than the sum of its proper divisors (59020).

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

43040 is a wasteful number, since it uses less digits than its factorization.

43040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 276 counting only the distinct ones).

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

The square root of 43040 is about 207.4608396782. The cubic root of 43040 is about 35.0448404870.

Adding to 43040 its reverse (4034), we get a palindrome (47074).

The spelling of 43040 in words is "forty-three thousand, forty", and thus it is an iban number.

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 269 538 1076 1345 2152 2690 4304 5380 8608 10760 21520 43040