Adding to 720720 its reverse (27027), we get a palindrome (747747).
It is a tau number, because it is divible by the number of its divisors (240).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a zygodrome in base 4.
It is a congruent number.
It is an unprimeable number.
720720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
720720 is a highly composite number, because it has more divisors than any smaller number.
720720 is a superabundant number, because it has a larger abundancy index than any smaller number.
2720720 is an apocalyptic number.
720720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 720720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624896).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
720720 is a wasteful number, since it uses less digits than its factorization.
720720 is an evil number, because the sum of its binary digits is even.
The square root of 720720 is about 848.9522954796. The cubic root of 720720 is about 89.6579610096.
The spelling of 720720 in words is "seven hundred twenty thousand, seven hundred twenty", and thus it is an iban number.