491264 has 36 divisors (see below), whose sum is σ = 1042440. Its totient is φ = 230400.

The previous prime is 491261. The next prime is 491273. The reversal of 491264 is 462194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491261) 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, 4814 + ... + 4914.

2⁴⁹¹²⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521220).

491264 is an abundant number, since it is smaller than the sum of its proper divisors (551176).

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

491264 is a wasteful number, since it uses less digits than its factorization.

491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 122 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 491264 is about 700.9022756419. The cubic root of 491264 is about 78.9050828210.

The spelling of 491264 in words is "four hundred ninety-one thousand, two hundred sixty-four".