8720012 has 48 divisors (see below), whose sum is σ = 18896640. Its totient is φ = 3436992.

The previous prime is 8719999. The next prime is 8720027. The reversal of 8720012 is 2100278.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19463 + ... + 19905.

It is an arithmetic number, because the mean of its divisors is an integer number (393680).

Almost surely, 2^8720012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8720012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9448320).

8720012 is an abundant number, since it is smaller than the sum of its proper divisors (10176628).

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

8720012 is a wasteful number, since it uses less digits than its factorization.

8720012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 8720012 is about 2952.9666439024. The cubic root of 8720012 is about 205.8285877310.

The spelling of 8720012 in words is "eight million, seven hundred twenty thousand, twelve".