4491618 has 8 divisors (see below), whose sum is σ = 8983248. Its totient is φ = 1497204.

The previous prime is 4491569. The next prime is 4491623. The reversal of 4491618 is 8161944.

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

4491618 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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, 374296 + ... + 374307.

It is an arithmetic number, because the mean of its divisors is an integer number (1122906).

Almost surely, 2^4491618 is an apocalyptic number.

4491618 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.

4491618 is a wasteful number, since it uses less digits than its factorization.

4491618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748608.

The product of its digits is 6912, while the sum is 33.

The square root of 4491618 is about 2119.3437663579. The cubic root of 4491618 is about 164.9937922366.

The spelling of 4491618 in words is "four million, four hundred ninety-one thousand, six hundred eighteen".