8391012 has 48 divisors (see below), whose sum is σ = 22536192. Its totient is φ = 2380320.

The previous prime is 8391011. The next prime is 8391023. The reversal of 8391012 is 2101938.

It is not an unprimeable number, because it can be changed into a prime (8391011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15783 + ... + 16305.

It is an arithmetic number, because the mean of its divisors is an integer number (469504).

Almost surely, 2^8391012 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 8391012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11268096).

8391012 is an abundant number, since it is smaller than the sum of its proper divisors (14145180).

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

8391012 is a wasteful number, since it uses less digits than its factorization.

8391012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 8391012 is about 2896.7243569246. The cubic root of 8391012 is about 203.2067425481.

The spelling of 8391012 in words is "eight million, three hundred ninety-one thousand, twelve".