43685745 has 24 divisors (see below), whose sum is σ = 72411456. Its totient is φ = 22489152.

The previous prime is 43685737. The next prime is 43685753. The reversal of 43685745 is 54758634.

It is an interprime number because it is at equal distance from previous prime (43685737) and next prime (43685753).

It is not a de Polignac number, because 43685745 - 2³ = 43685737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43685697 and 43685706.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10884 + ... + 14346.

It is an arithmetic number, because the mean of its divisors is an integer number (3017144).

Almost surely, 2^43685745 is an apocalyptic number.

It is an amenable number.

43685745 is a deficient number, since it is larger than the sum of its proper divisors (28725711).

43685745 is a wasteful number, since it uses less digits than its factorization.

43685745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529 (or 3500 counting only the distinct ones).

The product of its digits is 403200, while the sum is 42.

The square root of 43685745 is about 6609.5192714750. The cubic root of 43685745 is about 352.1923476331.

The spelling of 43685745 in words is "forty-three million, six hundred eighty-five thousand, seven hundred forty-five".