321334040 has 32 divisors (see below), whose sum is σ = 727803360. Its totient is φ = 127680000.

The previous prime is 321334021. The next prime is 321334049. The reversal of 321334040 is 40433123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321334049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20561 + ... + 32640.

It is an arithmetic number, because the mean of its divisors is an integer number (22743855).

Almost surely, 2^321334040 is an apocalyptic number.

It is an amenable number.

321334040 is an abundant number, since it is smaller than the sum of its proper divisors (406469320).

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

321334040 is a wasteful number, since it uses less digits than its factorization.

321334040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53363 (or 53359 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 321334040 is about 17925.7925905663. The cubic root of 321334040 is about 684.9395510264.

Adding to 321334040 its reverse (40433123), we get a palindrome (361767163).

The spelling of 321334040 in words is "three hundred twenty-one million, three hundred thirty-four thousand, forty".