491216 has 20 divisors (see below), whose sum is σ = 1038624. Its totient is φ = 223200.

The previous prime is 491213. The next prime is 491219. The reversal of 491216 is 612194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491213) and next prime (491219).

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 491191 and 491200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220 + ... + 1571.

2⁴⁹¹²¹⁶ is an apocalyptic number.

It is an amenable number.

491216 is an abundant number, since it is smaller than the sum of its proper divisors (547408).

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

491216 is a wasteful number, since it uses less digits than its factorization.

491216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 2804 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 491216 is about 700.8680332274. The cubic root of 491216 is about 78.9025128740.

It can be divided in two parts, 491 and 216, that added together give a palindrome (707).

The spelling of 491216 in words is "four hundred ninety-one thousand, two hundred sixteen".