491530 has 32 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 171072.

The previous prime is 491527. The next prime is 491531. The reversal of 491530 is 35194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371 + ... + 2569.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2⁴⁹¹⁵³⁰ is an apocalyptic number.

491530 is an abundant number, since it is smaller than the sum of its proper divisors (516470).

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

491530 is a wasteful number, since it uses less digits than its factorization.

491530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 491530 is about 701.0920053745. The cubic root of 491530 is about 78.9193215772.

The spelling of 491530 in words is "four hundred ninety-one thousand, five hundred thirty".