321329040 has 40 divisors (see below), whose sum is σ = 996120768. Its totient is φ = 85687680.

The previous prime is 321329011. The next prime is 321329051. The reversal of 321329040 is 40923123.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 321329040.

It is an unprimeable number.

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, 669196 + ... + 669675.

Almost surely, 2^321329040 is an apocalyptic number.

321329040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321329040 is an abundant number, since it is smaller than the sum of its proper divisors (674791728).

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

321329040 is a wasteful number, since it uses less digits than its factorization.

321329040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338887 (or 1338881 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 321329040 is about 17925.6531261765. The cubic root of 321329040 is about 684.9359984248.

The spelling of 321329040 in words is "three hundred twenty-one million, three hundred twenty-nine thousand, forty".