43666340 has 24 divisors (see below), whose sum is σ = 92611512. Its totient is φ = 17292800.

The previous prime is 43666303. The next prime is 43666369. The reversal of 43666340 is 4366634.

It can be written as a sum of positive squares in 4 ways, for example, as 7929856 + 35736484 = 2816^2 + 5978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43666297 and 43666306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8789 + ... + 12828.

It is an arithmetic number, because the mean of its divisors is an integer number (3858813).

Almost surely, 2^43666340 is an apocalyptic number.

It is an amenable number.

43666340 is an abundant number, since it is smaller than the sum of its proper divisors (48945172).

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

43666340 is a wasteful number, since it uses less digits than its factorization.

43666340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21727 (or 21725 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 43666340 is about 6608.0511499231. The cubic root of 43666340 is about 352.1401925218.

The spelling of 43666340 in words is "forty-three million, six hundred sixty-six thousand, three hundred forty".