720369 has 24 divisors (see below), whose sum is σ = 1153152. Its totient is φ = 430560.

The previous prime is 720367. The next prime is 720373. The reversal of 720369 is 963027.

It is not a de Polignac number, because 720369 - 2¹ = 720367 is a prime.

It is a super-2 number, since 2×720369² = 1037862992322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (720361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5434 + ... + 5564.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2⁷²⁰³⁶⁹ is an apocalyptic number.

It is an amenable number.

720369 is a deficient number, since it is larger than the sum of its proper divisors (432783).

720369 is a wasteful number, since it uses less digits than its factorization.

720369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 720369 is about 848.7455449073. The cubic root of 720369 is about 89.6434037824.

It can be divided in two parts, 720 and 369, that added together give a square (1089 = 33²).

The spelling of 720369 in words is "seven hundred twenty thousand, three hundred sixty-nine".