720435 has 8 divisors (see below), whose sum is σ = 1152720. Its totient is φ = 384224.

The previous prime is 720413. The next prime is 720439. The reversal of 720435 is 534027.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720435 - 2⁵ = 720403 is a prime.

720435 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (720439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24000 + ... + 24029.

It is an arithmetic number, because the mean of its divisors is an integer number (144090).

2⁷²⁰⁴³⁵ is an apocalyptic number.

720435 is a deficient number, since it is larger than the sum of its proper divisors (432285).

720435 is a wasteful number, since it uses less digits than its factorization.

720435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48037.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 720435 is about 848.7844249278. The cubic root of 720435 is about 89.6461413997.

The spelling of 720435 in words is "seven hundred twenty thousand, four hundred thirty-five".