720504 has 24 divisors (see below), whose sum is σ = 1951560. Its totient is φ = 240144.

The previous prime is 720497. The next prime is 720527. The reversal of 720504 is 405027.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4932 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (81315).

2⁷²⁰⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

720504 is an abundant number, since it is smaller than the sum of its proper divisors (1231056).

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

720504 is a wasteful number, since it uses less digits than its factorization.

720504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10019 (or 10012 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 720504 is about 848.8250703178. The cubic root of 720504 is about 89.6490032754.

The spelling of 720504 in words is "seven hundred twenty thousand, five hundred four".