731704320 has 352 divisors, whose sum is σ = 2672563200. Its totient is φ = 189775872.

The previous prime is 731704301. The next prime is 731704343. The reversal of 731704320 is 23407137.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9262041 + ... + 9262119.

Almost surely, 2^731704320 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 731704320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1336281600).

731704320 is an abundant number, since it is smaller than the sum of its proper divisors (1940858880).

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

731704320 is a wasteful number, since it uses less digits than its factorization.

731704320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 731704320 is about 27050.0336413839. The cubic root of 731704320 is about 901.1115155828. Note that the first 3 decimals are identical.

The spelling of 731704320 in words is "seven hundred thirty-one million, seven hundred four thousand, three hundred twenty".