321344772 has 24 divisors (see below), whose sum is σ = 856919616. Its totient is φ = 91812768.

The previous prime is 321344743. The next prime is 321344789. The reversal of 321344772 is 277443123.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912683 + ... + 1912850.

It is an arithmetic number, because the mean of its divisors is an integer number (35704984).

Almost surely, 2^321344772 is an apocalyptic number.

It is an amenable number.

321344772 is an abundant number, since it is smaller than the sum of its proper divisors (535574844).

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

321344772 is a wasteful number, since it uses less digits than its factorization.

321344772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825547 (or 3825545 counting only the distinct ones).

The product of its digits is 28224, while the sum is 33.

The square root of 321344772 is about 17926.0919332687. The cubic root of 321344772 is about 684.9471762061.

Adding to 321344772 its reverse (277443123), we get a palindrome (598787895).

The spelling of 321344772 in words is "three hundred twenty-one million, three hundred forty-four thousand, seven hundred seventy-two".