321324040 has 32 divisors (see below), whose sum is σ = 724734360. Its totient is φ = 128217600.

The previous prime is 321324037. The next prime is 321324041. The reversal of 321324040 is 40423123.

It can be written as a sum of positive squares in 4 ways, for example, as 92891044 + 228432996 = 9638^2 + 15114^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321323999 and 321324017.

It is not an unprimeable number, because it can be changed into a prime (321324041) 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, 7300 + ... + 26380.

Almost surely, 2^321324040 is an apocalyptic number.

It is an amenable number.

321324040 is an abundant number, since it is smaller than the sum of its proper divisors (403410320).

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

321324040 is a wasteful number, since it uses less digits than its factorization.

321324040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19513 (or 19509 counting only the distinct ones).

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

The square root of 321324040 is about 17925.5136607016. The cubic root of 321324040 is about 684.9324457863.

Adding to 321324040 its reverse (40423123), we get a palindrome (361747163).

The spelling of 321324040 in words is "three hundred twenty-one million, three hundred twenty-four thousand, forty".