720144 has 40 divisors (see below), whose sum is σ = 2068320. Its totient is φ = 239904.

The previous prime is 720133. The next prime is 720151. The reversal of 720144 is 441027.

It is a happy number.

720144 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 (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402 + ... + 1265.

It is an arithmetic number, because the mean of its divisors is an integer number (51708).

2⁷²⁰¹⁴⁴ is an apocalyptic number.

It is an amenable number.

720144 is an abundant number, since it is smaller than the sum of its proper divisors (1348176).

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

720144 is a wasteful number, since it uses less digits than its factorization.

720144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 720144 is about 848.6129859954. The cubic root of 720144 is about 89.6340697392.

The spelling of 720144 in words is "seven hundred twenty thousand, one hundred forty-four", and thus it is an iban number.