720385 has 8 divisors (see below), whose sum is σ = 910080. Its totient is φ = 545904.

The previous prime is 720373. The next prime is 720397. The reversal of 720385 is 583027.

720385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (720373) and next prime (720397).

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 720385 - 2⁷ = 720257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3697 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (113760).

2⁷²⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

720385 is a deficient number, since it is larger than the sum of its proper divisors (189695).

720385 is a wasteful number, since it uses less digits than its factorization.

720385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7607.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 720385 is about 848.7549705304. The cubic root of 720385 is about 89.6440674626.

The spelling of 720385 in words is "seven hundred twenty thousand, three hundred eighty-five".