723132 has 36 divisors (see below), whose sum is σ = 1867320. Its totient is φ = 235872.

The previous prime is 723127. The next prime is 723133. The reversal of 723132 is 231327.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723132.

It is not an unprimeable number, because it can be changed into a prime (723133) by changing a digit.

723132 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1719 + ... + 2097.

It is an arithmetic number, because the mean of its divisors is an integer number (51870).

2⁷²³¹³² 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 723132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933660).

723132 is an abundant number, since it is smaller than the sum of its proper divisors (1144188).

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

723132 is a wasteful number, since it uses less digits than its factorization.

723132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 437 counting only the distinct ones).

The product of its digits is 252, while the sum is 18.

The square root of 723132 is about 850.3716834420. The cubic root of 723132 is about 89.7578676798.

Adding to 723132 its reverse (231327), we get a palindrome (954459).

The spelling of 723132 in words is "seven hundred twenty-three thousand, one hundred thirty-two".