8391992 has 32 divisors (see below), whose sum is σ = 18081120. Its totient is φ = 3576960.

The previous prime is 8391959. The next prime is 8391997. The reversal of 8391992 is 2991938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15242 + ... + 15782.

It is an arithmetic number, because the mean of its divisors is an integer number (565035).

Almost surely, 2^8391992 is an apocalyptic number.

It is an amenable number.

8391992 is an abundant number, since it is smaller than the sum of its proper divisors (9689128).

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

8391992 is a wasteful number, since it uses less digits than its factorization.

8391992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831 (or 827 counting only the distinct ones).

The product of its digits is 34992, while the sum is 41.

The square root of 8391992 is about 2896.8935085709. The cubic root of 8391992 is about 203.2146531893.

The spelling of 8391992 in words is "eight million, three hundred ninety-one thousand, nine hundred ninety-two".