321400340 has 24 divisors (see below), whose sum is σ = 685017312. Its totient is φ = 126640800.

The previous prime is 321400337. The next prime is 321400349. The reversal of 321400340 is 43004123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321400349) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 118586 + ... + 121265.

It is an arithmetic number, because the mean of its divisors is an integer number (28542388).

Almost surely, 2^321400340 is an apocalyptic number.

It is an amenable number.

321400340 is an abundant number, since it is smaller than the sum of its proper divisors (363616972).

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

321400340 is a wasteful number, since it uses less digits than its factorization.

321400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239927 (or 239925 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 321400340 is about 17927.6417858011. The cubic root of 321400340 is about 684.9866550404.

Adding to 321400340 its reverse (43004123), we get a palindrome (364404463).

The spelling of 321400340 in words is "three hundred twenty-one million, four hundred thousand, three hundred forty".