591640 has 32 divisors (see below), whose sum is σ = 1522080. Its totient is φ = 202752.

The previous prime is 591623. The next prime is 591649. The reversal of 591640 is 46195.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (591649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777 + ... + 1336.

It is an arithmetic number, because the mean of its divisors is an integer number (47565).

2⁵⁹¹⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

591640 is an abundant number, since it is smaller than the sum of its proper divisors (930440).

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

591640 is a wasteful number, since it uses less digits than its factorization.

591640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 591640 is about 769.1813830300. The cubic root of 591640 is about 83.9497053420.

The spelling of 591640 in words is "five hundred ninety-one thousand, six hundred forty".