808720 has 40 divisors (see below), whose sum is σ = 2053440. Its totient is φ = 293760.

The previous prime is 808699. The next prime is 808721. The reversal of 808720 is 27808.

808720 = 40² + 41² + ... + 135².

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (808721) by changing a digit.

808720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 1339.

It is an arithmetic number, because the mean of its divisors is an integer number (51336).

2⁸⁰⁸⁷²⁰ is an apocalyptic number.

808720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1026720).

808720 is an abundant number, since it is smaller than the sum of its proper divisors (1244720).

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

808720 is a wasteful number, since it uses less digits than its factorization.

808720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 808720 is about 899.2886077339. The cubic root of 808720 is about 93.1678473457.

The spelling of 808720 in words is "eight hundred eight thousand, seven hundred twenty".