4391306 has 4 divisors (see below), whose sum is σ = 6586962. Its totient is φ = 2195652.

The previous prime is 4391263. The next prime is 4391323. The reversal of 4391306 is 6031934.

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

It can be written as a sum of positive squares in only one way, i.e., 4165681 + 225625 = 2041^2 + 475^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097825 + ... + 1097828.

Almost surely, 2^4391306 is an apocalyptic number.

4391306 is a deficient number, since it is larger than the sum of its proper divisors (2195656).

4391306 is a wasteful number, since it uses less digits than its factorization.

4391306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195655.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 4391306 is about 2095.5443206957. The cubic root of 4391306 is about 163.7562560009.

The spelling of 4391306 in words is "four million, three hundred ninety-one thousand, three hundred six".