491528 has 8 divisors (see below), whose sum is σ = 921630. Its totient is φ = 245760.

The previous prime is 491527. The next prime is 491531. The reversal of 491528 is 825194.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 58564 = 658^2 + 242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 491528.

It is not an unprimeable number, because it can be changed into a prime (491527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30713 + ... + 30728.

2⁴⁹¹⁵²⁸ is an apocalyptic number.

It is an amenable number.

491528 is a deficient number, since it is larger than the sum of its proper divisors (430102).

491528 is a wasteful number, since it uses less digits than its factorization.

491528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61447 (or 61443 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 491528 is about 701.0905790267. The cubic root of 491528 is about 78.9192145381.

The spelling of 491528 in words is "four hundred ninety-one thousand, five hundred twenty-eight".