321489140 has 24 divisors (see below), whose sum is σ = 771574272. Its totient is φ = 110224800.

The previous prime is 321489131. The next prime is 321489151. The reversal of 321489140 is 41984123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321489097 and 321489106.

It is a congruent number.

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, 1148036 + ... + 1148315.

It is an arithmetic number, because the mean of its divisors is an integer number (32148928).

Almost surely, 2^321489140 is an apocalyptic number.

It is an amenable number.

321489140 is an abundant number, since it is smaller than the sum of its proper divisors (450085132).

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

321489140 is a wasteful number, since it uses less digits than its factorization.

321489140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296367 (or 2296365 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 321489140 is about 17930.1182372008. The cubic root of 321489140 is about 685.0497344322.

The spelling of 321489140 in words is "three hundred twenty-one million, four hundred eighty-nine thousand, one hundred forty".