321430340 has 48 divisors (see below), whose sum is σ = 841567104. Its totient is φ = 100185600.

The previous prime is 321430337. The next prime is 321430357. The reversal of 321430340 is 43034123.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102821 + ... + 105900.

It is an arithmetic number, because the mean of its divisors is an integer number (17532648).

Almost surely, 2^321430340 is an apocalyptic number.

It is an amenable number.

321430340 is an abundant number, since it is smaller than the sum of its proper divisors (520136764).

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

321430340 is a wasteful number, since it uses less digits than its factorization.

321430340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208748 (or 208746 counting only the distinct ones).

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

The square root of 321430340 is about 17928.4784630487. The cubic root of 321430340 is about 685.0079669452.

Adding to 321430340 its reverse (43034123), we get a palindrome (364464463).

The spelling of 321430340 in words is "three hundred twenty-one million, four hundred thirty thousand, three hundred forty".