731980320 has 192 divisors, whose sum is σ = 2458874880. Its totient is φ = 182504448.

The previous prime is 731980309. The next prime is 731980321. The reversal of 731980320 is 23089137.

It is not an unprimeable number, because it can be changed into a prime (731980321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756477 + ... + 757443.

It is an arithmetic number, because the mean of its divisors is an integer number (12806640).

Almost surely, 2^731980320 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 731980320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229437440).

731980320 is an abundant number, since it is smaller than the sum of its proper divisors (1726894560).

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

731980320 is a wasteful number, since it uses less digits than its factorization.

731980320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 731980320 is about 27055.1348176275. The cubic root of 731980320 is about 901.2248015587.

The spelling of 731980320 in words is "seven hundred thirty-one million, nine hundred eighty thousand, three hundred twenty".