4393685 has 4 divisors (see below), whose sum is σ = 5272428. Its totient is φ = 3514944.

The previous prime is 4393643. The next prime is 4393687. The reversal of 4393685 is 5863934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 528529 + 3865156 = 727^2 + 1966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4393685 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4393687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439364 + ... + 439373.

It is an arithmetic number, because the mean of its divisors is an integer number (1318107).

Almost surely, 2^4393685 is an apocalyptic number.

It is an amenable number.

4393685 is a deficient number, since it is larger than the sum of its proper divisors (878743).

4393685 is an equidigital number, since it uses as much as digits as its factorization.

4393685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878742.

The product of its digits is 77760, while the sum is 38.

The square root of 4393685 is about 2096.1118767852. Note that the first 3 decimals coincide. The cubic root of 4393685 is about 163.7858224369.

The spelling of 4393685 in words is "four million, three hundred ninety-three thousand, six hundred eighty-five".