723112 has 32 divisors (see below), whose sum is σ = 1549800. Its totient is φ = 313344.

The previous prime is 723109. The next prime is 723113. The reversal of 723112 is 211327.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 695556 + 27556 = 834^2 + 166^2 .

It is not an unprimeable number, because it can be changed into a prime (723113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564 + ... + 1972.

2⁷²³¹¹² 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 723112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774900).

723112 is an abundant number, since it is smaller than the sum of its proper divisors (826688).

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

723112 is a wasteful number, since it uses less digits than its factorization.

723112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 441 counting only the distinct ones).

The product of its digits is 84, while the sum is 16.

The square root of 723112 is about 850.3599237970. The cubic root of 723112 is about 89.7570401804.

Adding to 723112 its reverse (211327), we get a palindrome (934439).

The spelling of 723112 in words is "seven hundred twenty-three thousand, one hundred twelve", and thus it is an iban number.