8200720 has 40 divisors (see below), whose sum is σ = 20802240. Its totient is φ = 2981760.

The previous prime is 8200691. The next prime is 8200721. The reversal of 8200720 is 270028.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8200721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3780 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (520056).

Almost surely, 2^8200720 is an apocalyptic number.

8200720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8200720 is an abundant number, since it is smaller than the sum of its proper divisors (12601520).

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

8200720 is a wasteful number, since it uses less digits than its factorization.

8200720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343 (or 9337 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 8200720 is about 2863.6899273490. The cubic root of 8200720 is about 201.6588693872.

Adding to 8200720 its reverse (270028), we get a palindrome (8470748).

The spelling of 8200720 in words is "eight million, two hundred thousand, seven hundred twenty".