324409640 has 32 divisors (see below), whose sum is σ = 772859880. Its totient is φ = 122130432.

The previous prime is 324409639. The next prime is 324409649. The reversal of 324409640 is 46904423.

It can be written as a sum of positive squares in 4 ways, for example, as 241926916 + 82482724 = 15554^2 + 9082^2 .

It is a super-2 number, since 2×324409640² = 210483229049859200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 324409597 and 324409606.

It is not an unprimeable number, because it can be changed into a prime (324409649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237857 + ... + 239216.

Almost surely, 2^324409640 is an apocalyptic number.

It is an amenable number.

324409640 is an abundant number, since it is smaller than the sum of its proper divisors (448450240).

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

324409640 is a wasteful number, since it uses less digits than its factorization.

324409640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477101 (or 477097 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 324409640 is about 18011.3752945187. The cubic root of 324409640 is about 687.1178808770.

The spelling of 324409640 in words is "three hundred twenty-four million, four hundred nine thousand, six hundred forty".