491910 has 32 divisors (see below), whose sum is σ = 1244160. Its totient is φ = 124128.

The previous prime is 491899. The next prime is 491923. The reversal of 491910 is 19194.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2⁴⁹¹⁹¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622080).

491910 is an abundant number, since it is smaller than the sum of its proper divisors (752250).

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

491910 is a wasteful number, since it uses less digits than its factorization.

491910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 491910 is about 701.3629588166. The cubic root of 491910 is about 78.9396537491.

The spelling of 491910 in words is "four hundred ninety-one thousand, nine hundred ten".