8820720 has 60 divisors (see below), whose sum is σ = 29625336. Its totient is φ = 2352000.

The previous prime is 8820697. The next prime is 8820733. The reversal of 8820720 is 270288.

8820720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5406 + ... + 6845.

Almost surely, 2^8820720 is an apocalyptic number.

8820720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8820720 is an abundant number, since it is smaller than the sum of its proper divisors (20804616).

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

8820720 is a wasteful number, since it uses less digits than its factorization.

8820720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12270 (or 12261 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 8820720 is about 2969.9696968151. The cubic root of 8820720 is about 206.6179327800.

It can be divided in two parts, 8820 and 720, that multiplied together give a square (6350400 = 2520²).

The spelling of 8820720 in words is "eight million, eight hundred twenty thousand, seven hundred twenty".