723172944 has 80 divisors (see below), whose sum is σ = 2021315072. Its totient is φ = 221474304.

The previous prime is 723172943. The next prime is 723172949. The reversal of 723172944 is 449271327.

723172944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723172943) 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, 136554 + ... + 141750.

Almost surely, 2^723172944 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 723172944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010657536).

723172944 is an abundant number, since it is smaller than the sum of its proper divisors (1298142128).

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

723172944 is a wasteful number, since it uses less digits than its factorization.

723172944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444 (or 5438 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 723172944 is about 26891.8750554884. The cubic root of 723172944 is about 897.5956168901.

The spelling of 723172944 in words is "seven hundred twenty-three million, one hundred seventy-two thousand, nine hundred forty-four".