4491138 has 8 divisors (see below), whose sum is σ = 8982288. Its totient is φ = 1497044.

The previous prime is 4491133. The next prime is 4491161. The reversal of 4491138 is 8311944.

It is a happy number.

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

4491138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (4491133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374256 + ... + 374267.

It is an arithmetic number, because the mean of its divisors is an integer number (1122786).

Almost surely, 2^4491138 is an apocalyptic number.

4491138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4491138 is a wasteful number, since it uses less digits than its factorization.

4491138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748528.

The product of its digits is 3456, while the sum is 30.

The square root of 4491138 is about 2119.2305207315. The cubic root of 4491138 is about 164.9879146337.

The spelling of 4491138 in words is "four million, four hundred ninety-one thousand, one hundred thirty-eight".