720036 has 48 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 233856.

The previous prime is 720023. The next prime is 720053. The reversal of 720036 is 630027.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

720036 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6316 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2⁷²⁰⁰³⁶ 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 720036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957600).

720036 is an abundant number, since it is smaller than the sum of its proper divisors (1195164).

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

720036 is a wasteful number, since it uses less digits than its factorization.

720036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 720036 is about 848.5493503621. The cubic root of 720036 is about 89.6295887078.

Subtracting from 720036 its reverse (630027), we obtain a palindrome (90009).

The spelling of 720036 in words is "seven hundred twenty thousand, thirty-six".