731152320 has 224 divisors, whose sum is σ = 2496531456. Its totient is φ = 180633600.

The previous prime is 731152273. The next prime is 731152327. The reversal of 731152320 is 23251137.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731152327) 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, 1158405 + ... + 1159035.

Almost surely, 2^731152320 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 731152320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248265728).

731152320 is an abundant number, since it is smaller than the sum of its proper divisors (1765379136).

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

731152320 is a wasteful number, since it uses less digits than its factorization.

731152320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 731152320 is about 27039.8284018224. The cubic root of 731152320 is about 900.8848581389.

The spelling of 731152320 in words is "seven hundred thirty-one million, one hundred fifty-two thousand, three hundred twenty".