720944 has 40 divisors (see below), whose sum is σ = 1645728. Its totient is φ = 299520.

The previous prime is 720943. The next prime is 720947. The reversal of 720944 is 449027.

It is a super-2 number, since 2×720944² = 1039520502272, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720944.

It is not an unprimeable number, because it can be changed into a prime (720943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4514 + ... + 4670.

2⁷²⁰⁹⁴⁴ 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 720944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822864).

720944 is an abundant number, since it is smaller than the sum of its proper divisors (924784).

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

720944 is a wasteful number, since it uses less digits than its factorization.

720944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 720944 is about 849.0842125490. The cubic root of 720944 is about 89.6672486216.

The spelling of 720944 in words is "seven hundred twenty thousand, nine hundred forty-four".