4491966 has 16 divisors (see below), whose sum is σ = 9039744. Its totient is φ = 1488024.

The previous prime is 4491953. The next prime is 4491989. The reversal of 4491966 is 6691944.

It is a plaindrome in base 16.

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 in 7 ways as a sum of consecutive naturals, for example, 1240 + ... + 3243.

It is an arithmetic number, because the mean of its divisors is an integer number (564984).

Almost surely, 2^4491966 is an apocalyptic number.

4491966 is an abundant number, since it is smaller than the sum of its proper divisors (4547778).

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

4491966 is a wasteful number, since it uses less digits than its factorization.

4491966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its digits is 46656, while the sum is 39.

The square root of 4491966 is about 2119.4258656532. The cubic root of 4491966 is about 164.9980532369.

It can be divided in two parts, 449 and 1966, that added together give a triangular number (2415 = T₆₉).

The spelling of 4491966 in words is "four million, four hundred ninety-one thousand, nine hundred sixty-six".