321740428 has 12 divisors (see below), whose sum is σ = 563902192. Its totient is φ = 160625520.

The previous prime is 321740417. The next prime is 321740431. The reversal of 321740428 is 824047123.

321740428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 321740428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58200 + ... + 63487.

Almost surely, 2^321740428 is an apocalyptic number.

It is an amenable number.

321740428 is a deficient number, since it is larger than the sum of its proper divisors (242161764).

321740428 is a wasteful number, since it uses less digits than its factorization.

321740428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122352 (or 122350 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 321740428 is about 17937.1242957170. The cubic root of 321740428 is about 685.2281748252.

The spelling of 321740428 in words is "three hundred twenty-one million, seven hundred forty thousand, four hundred twenty-eight".