731380 has 48 divisors (see below), whose sum is σ = 1728720. Its totient is φ = 258048.

The previous prime is 731369. The next prime is 731389. The reversal of 731380 is 83137.

731380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 55696 + 675684 = 236^2 + 822^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7492 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (36015).

2⁷³¹³⁸⁰ 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 731380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864360).

731380 is an abundant number, since it is smaller than the sum of its proper divisors (997340).

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

731380 is a wasteful number, since it uses less digits than its factorization.

731380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 731380 is about 855.2075771414. The cubic root of 731380 is about 90.0978359941.

It can be divided in two parts, 731 and 380, that added together give a palindrome (1111).

The spelling of 731380 in words is "seven hundred thirty-one thousand, three hundred eighty".