806720 has 28 divisors (see below), whose sum is σ = 1921764. Its totient is φ = 322560.

The previous prime is 806719. The next prime is 806737. The reversal of 806720 is 27608.

It can be written as a sum of positive squares in 2 ways, for example, as 87616 + 719104 = 296^2 + 848^2 .

It is a congruent number.

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, 941 + ... + 1580.

2⁸⁰⁶⁷²⁰ is an apocalyptic number.

806720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

806720 is an abundant number, since it is smaller than the sum of its proper divisors (1115044).

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

806720 is a wasteful number, since it uses less digits than its factorization.

806720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2528 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 806720 is about 898.1759293145. The cubic root of 806720 is about 93.0909812233.

The spelling of 806720 in words is "eight hundred six thousand, seven hundred twenty".