723665724 has 48 divisors (see below), whose sum is σ = 1793207808. Its totient is φ = 226355968.

The previous prime is 723665713. The next prime is 723665729. The reversal of 723665724 is 427566327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723665729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65677 + ... + 75899.

It is an arithmetic number, because the mean of its divisors is an integer number (37358496).

Almost surely, 2^723665724 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 723665724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896603904).

723665724 is an abundant number, since it is smaller than the sum of its proper divisors (1069542084).

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

723665724 is a wasteful number, since it uses less digits than its factorization.

723665724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10594 (or 10592 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The square root of 723665724 is about 26901.0357421420. The cubic root of 723665724 is about 897.7994486027.

The spelling of 723665724 in words is "seven hundred twenty-three million, six hundred sixty-five thousand, seven hundred twenty-four".