8191992 has 16 divisors (see below), whose sum is σ = 20480040. Its totient is φ = 2730656.

The previous prime is 8191991. The next prime is 8192003. The reversal of 8191992 is 2991918.

It is a happy number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 8191992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8191991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170643 + ... + 170690.

Almost surely, 2^8191992 is an apocalyptic number.

It is an amenable number.

8191992 is an abundant number, since it is smaller than the sum of its proper divisors (12288048).

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

8191992 is a wasteful number, since it uses less digits than its factorization.

8191992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341342 (or 341338 counting only the distinct ones).

The product of its digits is 11664, while the sum is 39.

The square root of 8191992 is about 2862.1656136569. The cubic root of 8191992 is about 201.5873023623.

The spelling of 8191992 in words is "eight million, one hundred ninety-one thousand, nine hundred ninety-two".