43685316 has 18 divisors (see below), whose sum is σ = 110426862. Its totient is φ = 14561760.

The previous prime is 43685309. The next prime is 43685321. The reversal of 43685316 is 61358634.

It can be written as a sum of positive squares in only one way, i.e., 43560000 + 125316 = 6600^2 + 354^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1213481 = 43685316 / (4 + 3 + 6 + 8 + 5 + 3 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 606705 + ... + 606776.

Almost surely, 2^43685316 is an apocalyptic number.

It is an amenable number.

43685316 is an abundant number, since it is smaller than the sum of its proper divisors (66741546).

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

43685316 is a wasteful number, since it uses less digits than its factorization.

43685316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213491 (or 1213486 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 43685316 is about 6609.4868182031. The cubic root of 43685316 is about 352.1911947703.

The spelling of 43685316 in words is "forty-three million, six hundred eighty-five thousand, three hundred sixteen".