491288 has 32 divisors (see below), whose sum is σ = 1090560. Its totient is φ = 203040.

The previous prime is 491279. The next prime is 491297. The reversal of 491288 is 882194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491279) and next prime (491297).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491288.

It is an unprimeable number.

491288 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, 1595 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (34080).

2⁴⁹¹²⁸⁸ 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 491288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545280).

491288 is an abundant number, since it is smaller than the sum of its proper divisors (599272).

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

491288 is a wasteful number, since it uses less digits than its factorization.

491288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 323 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 491288 is about 700.9193962218. The cubic root of 491288 is about 78.9063677317.

The spelling of 491288 in words is "four hundred ninety-one thousand, two hundred eighty-eight".