321247668 has 192 divisors, whose sum is σ = 958791680. Its totient is φ = 81648000.

The previous prime is 321247631. The next prime is 321247673. The reversal of 321247668 is 866742123.

It is a happy number.

Its product of digits (96768) is a multiple of the sum of its prime divisors (256).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2127393 + ... + 2127543.

Almost surely, 2^321247668 is an apocalyptic number.

321247668 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321247668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479395840).

321247668 is an abundant number, since it is smaller than the sum of its proper divisors (637544012).

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

321247668 is a wasteful number, since it uses less digits than its factorization.

321247668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 256 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 321247668 is about 17923.3832743709. The cubic root of 321247668 is about 684.8781767835.

The spelling of 321247668 in words is "three hundred twenty-one million, two hundred forty-seven thousand, six hundred sixty-eight".