321799716 has 240 divisors, whose sum is σ = 1040793600. Its totient is φ = 84680640.

The previous prime is 321799691. The next prime is 321799717. The reversal of 321799716 is 617997123.

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

It is not an unprimeable number, because it can be changed into a prime (321799717) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1616985 + ... + 1617183.

It is an arithmetic number, because the mean of its divisors is an integer number (4336640).

Almost surely, 2^321799716 is an apocalyptic number.

321799716 is a gapful number since it is divisible by the number (36) 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 321799716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520396800).

321799716 is an abundant number, since it is smaller than the sum of its proper divisors (718993884).

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

321799716 is a wasteful number, since it uses less digits than its factorization.

321799716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 265 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 321799716 is about 17938.7768813819. The cubic root of 321799716 is about 685.2702618715.

The spelling of 321799716 in words is "three hundred twenty-one million, seven hundred ninety-nine thousand, seven hundred sixteen".