723243648 has 128 divisors (see below), whose sum is σ = 2123003520. Its totient is φ = 216989696.

The previous prime is 723243629. The next prime is 723243679. The reversal of 723243648 is 846342327.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

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, 147736 + ... + 152552.

It is an arithmetic number, because the mean of its divisors is an integer number (16585965).

Almost surely, 2^723243648 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 723243648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061501760).

723243648 is an abundant number, since it is smaller than the sum of its proper divisors (1399759872).

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

723243648 is a wasteful number, since it uses less digits than its factorization.

723243648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874 (or 4862 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 723243648 is about 26893.1896211662. The cubic root of 723243648 is about 897.6248683220.

The spelling of 723243648 in words is "seven hundred twenty-three million, two hundred forty-three thousand, six hundred forty-eight".