531680 has 24 divisors (see below), whose sum is σ = 1256472. Its totient is φ = 212608.

The previous prime is 531673. The next prime is 531689. The reversal of 531680 is 86135.

It is an Ulam number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531689) by changing a digit.

531680 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 1821.

It is an arithmetic number, because the mean of its divisors is an integer number (52353).

2⁵³¹⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

531680 is an abundant number, since it is smaller than the sum of its proper divisors (724792).

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

531680 is a wasteful number, since it uses less digits than its factorization.

531680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 531680 is about 729.1639047567. The cubic root of 531680 is about 81.0121406382.

The spelling of 531680 in words is "five hundred thirty-one thousand, six hundred eighty".