744720 has 80 divisors (see below), whose sum is σ = 2410560. Its totient is φ = 189952.

The previous prime is 744707. The next prime is 744721. The reversal of 744720 is 27447.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (744721) 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, 6907 + ... + 7013.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁷⁴⁴⁷²⁰ 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 744720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205280).

744720 is an abundant number, since it is smaller than the sum of its proper divisors (1665840).

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

744720 is a wasteful number, since it uses less digits than its factorization.

744720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 146 counting only the distinct ones).

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

The square root of 744720 is about 862.9716101935. The cubic root of 744720 is about 90.6423185293.

The spelling of 744720 in words is "seven hundred forty-four thousand, seven hundred twenty", and thus it is an iban number.