491646 has 16 divisors (see below), whose sum is σ = 998784. Its totient is φ = 161304.

The previous prime is 491639. The next prime is 491651. The reversal of 491646 is 646194.

It is a congruent number.

It is an unprimeable number.

491646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 1013.

It is an arithmetic number, because the mean of its divisors is an integer number (62424).

2⁴⁹¹⁶⁴⁶ is an apocalyptic number.

491646 is an abundant number, since it is smaller than the sum of its proper divisors (507138).

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

491646 is a wasteful number, since it uses less digits than its factorization.

491646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295.

The product of its digits is 5184, while the sum is 30.

The square root of 491646 is about 701.1747285805. The cubic root of 491646 is about 78.9255293511.

The spelling of 491646 in words is "four hundred ninety-one thousand, six hundred forty-six".