43686340 has 12 divisors (see below), whose sum is σ = 91741356. Its totient is φ = 17474528.

The previous prime is 43686337. The next prime is 43686367. The reversal of 43686340 is 4368634.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 22581504 = 4594^2 + 4752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43686296 and 43686305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092139 + ... + 1092178.

It is an arithmetic number, because the mean of its divisors is an integer number (7645113).

Almost surely, 2^43686340 is an apocalyptic number.

It is an amenable number.

43686340 is an abundant number, since it is smaller than the sum of its proper divisors (48055016).

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

43686340 is a wasteful number, since it uses less digits than its factorization.

43686340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184326 (or 2184324 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 43686340 is about 6609.5642821596. The cubic root of 43686340 is about 352.1939465795.

The spelling of 43686340 in words is "forty-three million, six hundred eighty-six thousand, three hundred forty".