8229720 has 32 divisors (see below), whose sum is σ = 24689520. Its totient is φ = 2194560.

The previous prime is 8229701. The next prime is 8229731. The reversal of 8229720 is 279228.

8229720 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 34171 + ... + 34410.

Almost surely, 2^8229720 is an apocalyptic number.

It is an amenable number.

8229720 is an abundant number, since it is smaller than the sum of its proper divisors (16459800).

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

8229720 is a wasteful number, since it uses less digits than its factorization.

8229720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68595 (or 68591 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8229720 is about 2868.7488562089. The cubic root of 8229720 is about 201.8962968008.

The spelling of 8229720 in words is "eight million, two hundred twenty-nine thousand, seven hundred twenty".