324640 has 24 divisors (see below), whose sum is σ = 767340. Its totient is φ = 129792.

The previous prime is 324637. The next prime is 324641. The reversal of 324640 is 46423.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 24336 = 548^2 + 156^2 .

It is a super-2 number, since 2×324640² = 210782259200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (324641) 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 3 ways as a sum of consecutive naturals, for example, 855 + ... + 1174.

2³²⁴⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

324640 is an abundant number, since it is smaller than the sum of its proper divisors (442700).

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

324640 is a wasteful number, since it uses less digits than its factorization.

324640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 324640 is about 569.7718841782. The cubic root of 324640 is about 68.7280480879.

It can be divided in two parts, 3 and 24640, that multiplied together give a triangular number (73920 = T₃₈₄).

The spelling of 324640 in words is "three hundred twenty-four thousand, six hundred forty".