720744 has 32 divisors (see below), whose sum is σ = 1836000. Its totient is φ = 235712.

The previous prime is 720743. The next prime is 720763. The reversal of 720744 is 447027.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720744.

It is not an unprimeable number, because it can be changed into a prime (720743) 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 7 ways as a sum of consecutive naturals, for example, 1162 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (57375).

2⁷²⁰⁷⁴⁴ 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 720744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918000).

720744 is an abundant number, since it is smaller than the sum of its proper divisors (1115256).

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

720744 is a wasteful number, since it uses less digits than its factorization.

720744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 720744 is about 848.9664304317. The cubic root of 720744 is about 89.6589562030.

The spelling of 720744 in words is "seven hundred twenty thousand, seven hundred forty-four", and thus it is an iban number.