4491290 has 8 divisors (see below), whose sum is σ = 8084340. Its totient is φ = 1796512.

The previous prime is 4491241. The next prime is 4491301. The reversal of 4491290 is 921944.

It can be written as a sum of positive squares in 2 ways, for example, as 4456321 + 34969 = 2111^2 + 187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 224555 + ... + 224574.

Almost surely, 2^4491290 is an apocalyptic number.

4491290 is a deficient number, since it is larger than the sum of its proper divisors (3593050).

4491290 is a wasteful number, since it uses less digits than its factorization.

4491290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449136.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 4491290 is about 2119.2663825013. The cubic root of 4491290 is about 164.9897759199.

The spelling of 4491290 in words is "four million, four hundred ninety-one thousand, two hundred ninety".