720786 has 32 divisors (see below), whose sum is σ = 1605888. Its totient is φ = 213840.

The previous prime is 720779. The next prime is 720791. The reversal of 720786 is 687027.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 15 ways as a sum of consecutive naturals, for example, 4341 + ... + 4503.

It is an arithmetic number, because the mean of its divisors is an integer number (50184).

2⁷²⁰⁷⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802944).

720786 is an abundant number, since it is smaller than the sum of its proper divisors (885102).

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

720786 is a wasteful number, since it uses less digits than its factorization.

720786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 720786 is about 848.9911660318. The cubic root of 720786 is about 89.6606977381.

The spelling of 720786 in words is "seven hundred twenty thousand, seven hundred eighty-six".