321230440 has 16 divisors (see below), whose sum is σ = 722768580. Its totient is φ = 128492160.

The previous prime is 321230431. The next prime is 321230461. The reversal of 321230440 is 44032123.

It can be written as a sum of positive squares in 2 ways, for example, as 287845156 + 33385284 = 16966^2 + 5778^2 .

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 3 ways as a sum of consecutive naturals, for example, 4015341 + ... + 4015420.

Almost surely, 2^321230440 is an apocalyptic number.

It is an amenable number.

321230440 is an abundant number, since it is smaller than the sum of its proper divisors (401538140).

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

321230440 is a wasteful number, since it uses less digits than its factorization.

321230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8030772 (or 8030768 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 321230440 is about 17922.9026666999. The cubic root of 321230440 is about 684.8659335900.

Adding to 321230440 its reverse (44032123), we get a palindrome (365262563).

The spelling of 321230440 in words is "three hundred twenty-one million, two hundred thirty thousand, four hundred forty".