4491664 has 10 divisors (see below), whose sum is σ = 8702630. Its totient is φ = 2245824.

The previous prime is 4491659. The next prime is 4491667. The reversal of 4491664 is 4661944.

It can be written as a sum of positive squares in only one way, i.e., 2822400 + 1669264 = 1680^2 + 1292^2 .

It is a d-powerful number, because it can be written as 4⁵ + 4⁷ + 9 + 1 + 6 + 6⁷ + 4¹¹ .

It is not an unprimeable number, because it can be changed into a prime (4491667) by changing a digit.

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, 140349 + ... + 140380.

It is an arithmetic number, because the mean of its divisors is an integer number (870263).

Almost surely, 2^4491664 is an apocalyptic number.

It is an amenable number.

4491664 is a deficient number, since it is larger than the sum of its proper divisors (4210966).

4491664 is a wasteful number, since it uses less digits than its factorization.

4491664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280737 (or 280731 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 4491664 is about 2119.3546187460. The cubic root of 4491664 is about 164.9943554849.

The spelling of 4491664 in words is "four million, four hundred ninety-one thousand, six hundred sixty-four".