491406 has 8 divisors (see below), whose sum is σ = 982824. Its totient is φ = 163800.

The previous prime is 491377. The next prime is 491417. The reversal of 491406 is 604194.

491406 = 349² + 350² + ... + 352².

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

491406 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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, 40945 + ... + 40956.

It is an arithmetic number, because the mean of its divisors is an integer number (122853).

2⁴⁹¹⁴⁰⁶ is an apocalyptic number.

491406 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.

491406 is a wasteful number, since it uses less digits than its factorization.

491406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81906.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 491406 is about 701.0035663247. The cubic root of 491406 is about 78.9126846009.

The spelling of 491406 in words is "four hundred ninety-one thousand, four hundred six".