4491238 has 4 divisors (see below), whose sum is σ = 6736860. Its totient is φ = 2245618.

The previous prime is 4491217. The next prime is 4491241. The reversal of 4491238 is 8321944.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1122808 + ... + 1122811.

It is an arithmetic number, because the mean of its divisors is an integer number (1684215).

Almost surely, 2^4491238 is an apocalyptic number.

4491238 is a deficient number, since it is larger than the sum of its proper divisors (2245622).

4491238 is a wasteful number, since it uses less digits than its factorization.

4491238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245621.

The product of its digits is 6912, while the sum is 31.

The square root of 4491238 is about 2119.2541140694. The cubic root of 4491238 is about 164.9891391688.

The spelling of 4491238 in words is "four million, four hundred ninety-one thousand, two hundred thirty-eight".