321422464 has 48 divisors (see below), whose sum is σ = 703871910. Its totient is φ = 146094080.

The previous prime is 321422461. The next prime is 321422503. The reversal of 321422464 is 464224123.

It can be written as a sum of positive squares in only one way, i.e., 294465600 + 26956864 = 17160^2 + 5192^2 .

It is not an unprimeable number, because it can be changed into a prime (321422461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5112 + ... + 25864.

Almost surely, 2^321422464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321422464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351935955).

321422464 is an abundant number, since it is smaller than the sum of its proper divisors (382449446).

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

321422464 is a wasteful number, since it uses less digits than its factorization.

321422464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789 (or 20766 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 321422464 is about 17928.2588111618. The cubic root of 321422464 is about 685.0023719882.

Adding to 321422464 its reverse (464224123), we get a palindrome (785646587).

The spelling of 321422464 in words is "three hundred twenty-one million, four hundred twenty-two thousand, four hundred sixty-four".