321423424 has 28 divisors (see below), whose sum is σ = 728943424. Its totient is φ = 137752704.

The previous prime is 321423391. The next prime is 321423433. The reversal of 321423424 is 424324123.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

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, 358284 + ... + 359179.

Almost surely, 2^321423424 is an apocalyptic number.

It is an amenable number.

321423424 is an abundant number, since it is smaller than the sum of its proper divisors (407520000).

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

321423424 is an equidigital number, since it uses as much as digits as its factorization.

321423424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717482 (or 717472 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 321423424 is about 17928.2855845170. The cubic root of 321423424 is about 685.0030539584.

Adding to 321423424 its reverse (424324123), we get a palindrome (745747547).

The spelling of 321423424 in words is "three hundred twenty-one million, four hundred twenty-three thousand, four hundred twenty-four".