43660 has 24 divisors (see below), whose sum is σ = 95760. Its totient is φ = 16704.

The previous prime is 43651. The next prime is 43661. The reversal of 43660 is 6634.

43660 = T₅ + T₆ + ... + T₆₃.

It is a happy number.

43660 is a nontrivial binomial coefficient, being equal to C(296, 2).

It is not an unprimeable number, because it can be changed into a prime (43661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711 + ... + 769.

It is an arithmetic number, because the mean of its divisors is an integer number (3990).

2⁴³⁶⁶⁰ is an apocalyptic number.

43660 is the 295-th triangular number and also the 148-th hexagonal number.

43660 is the 99-th centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47880).

43660 is an abundant number, since it is smaller than the sum of its proper divisors (52100).

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

43660 is a wasteful number, since it uses less digits than its factorization.

43660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 43660 is about 208.9497547259. The cubic root of 43660 is about 35.2123149059.

It can be divided in two parts, 436 and 60, that added together give a triangular number (496 = T₃₁).

The spelling of 43660 in words is "forty-three thousand, six hundred sixty".