4490645 has 4 divisors (see below), whose sum is σ = 5388780. Its totient is φ = 3592512.

The previous prime is 4490639. The next prime is 4490657. The reversal of 4490645 is 5460944.

It is a happy number.

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 1661521 + 2829124 = 1289^2 + 1682^2 .

It is a cyclic number.

It is not a de Polignac number, because 4490645 - 2⁶ = 4490581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449060 + ... + 449069.

It is an arithmetic number, because the mean of its divisors is an integer number (1347195).

Almost surely, 2^4490645 is an apocalyptic number.

It is an amenable number.

4490645 is a deficient number, since it is larger than the sum of its proper divisors (898135).

4490645 is an equidigital number, since it uses as much as digits as its factorization.

4490645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898134.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4490645 is about 2119.1142017362. The cubic root of 4490645 is about 164.9818774097.

Subtracting 4490645 from its reverse (5460944), we obtain a cube (970299 = 99³).

The spelling of 4490645 in words is "four million, four hundred ninety thousand, six hundred forty-five".