720000 has 120 divisors (see below), whose sum is σ = 2589015.
Its totient is φ = 192000.
The previous prime is 719989. The next prime is 720007. The reversal of 720000 is 27.
Adding to 720000 its reverse (27), we get a palindrome (720027).
It is a powerful number, because all its prime factors have an exponent greater than 1
and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 3 ways, for example, as 166464 + 553536 = 408^2 + 744^2
It is a tau number, because it is divible by the number of its divisors (120).
It is an ABA number since it can be written as A⋅BA, here for A=2, B=600.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a nialpdrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (720007) by changing a digit.
720000 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 143998 + ... + 144002.
2720000 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 720000
720000 is an abundant number, since it is smaller than the sum of its proper divisors (1869015).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
720000 is an equidigital number, since it uses as much as digits as its factorization.
720000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 40 (or 10 counting only the distinct ones).
The product of its (nonzero) digits is 14, while the sum is 9.
The square root of 720000 is about 848.5281374239.
The cubic root of 720000 is about 89.6280949311.
The spelling of 720000 in words is "seven hundred twenty thousand", and thus it is an iban number.