4490591 has 4 divisors (see below), whose sum is σ = 5132112. Its totient is φ = 3849072.

The previous prime is 4490587. The next prime is 4490599. The reversal of 4490591 is 1950944.

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

It is a cyclic number.

It is not a de Polignac number, because 4490591 - 2² = 4490587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4490599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320750 + ... + 320763.

It is an arithmetic number, because the mean of its divisors is an integer number (1283028).

Almost surely, 2^4490591 is an apocalyptic number.

4490591 is a deficient number, since it is larger than the sum of its proper divisors (641521).

4490591 is an equidigital number, since it uses as much as digits as its factorization.

4490591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641520.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 4490591 is about 2119.1014605252. The cubic root of 4490591 is about 164.9812161047.

The spelling of 4490591 in words is "four million, four hundred ninety thousand, five hundred ninety-one".