491508 has 60 divisors (see below), whose sum is σ = 1351812. Its totient is φ = 155520.

The previous prime is 491503. The next prime is 491527. The reversal of 491508 is 805194.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 272484 = 468^2 + 522^2 .

It is a super-2 number, since 2×491508² = 483160228128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491501) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11968 + ... + 12008.

2⁴⁹¹⁵⁰⁸ 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 491508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675906).

491508 is an abundant number, since it is smaller than the sum of its proper divisors (860304).

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

491508 is a wasteful number, since it uses less digits than its factorization.

491508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 491508 is about 701.0763153894. The cubic root of 491508 is about 78.9181441306.

It can be divided in two parts, 491 and 508, that added together give a palindrome (999).

The spelling of 491508 in words is "four hundred ninety-one thousand, five hundred eight".