720896 has 34 divisors (see below), whose sum is σ = 1572852. Its totient is φ = 327680.

The previous prime is 720887. The next prime is 720899. The reversal of 720896 is 698027.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (720899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65531 + ... + 65541.

2⁷²⁰⁸⁹⁶ 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 720896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786426).

720896 is an abundant number, since it is smaller than the sum of its proper divisors (851956).

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

720896 is an frugal number, since it uses more digits than its factorization.

720896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43 (or 13 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 720896 is about 849.0559463310. The cubic root of 720896 is about 89.6652585810.

The spelling of 720896 in words is "seven hundred twenty thousand, eight hundred ninety-six".