720784 has 20 divisors (see below), whose sum is σ = 1470640. Its totient is φ = 341280.

The previous prime is 720779. The next prime is 720791. The reversal of 720784 is 487027.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (73532).

2⁷²⁰⁷⁸⁴ is an apocalyptic number.

It is an amenable number.

720784 is an abundant number, since it is smaller than the sum of its proper divisors (749856).

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

720784 is a wasteful number, since it uses less digits than its factorization.

720784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2392 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 720784 is about 848.9899881624. The cubic root of 720784 is about 89.6606148094.

The spelling of 720784 in words is "seven hundred twenty thousand, seven hundred eighty-four".