8129992 has 16 divisors (see below), whose sum is σ = 16416540. Its totient is φ = 3752256.

The previous prime is 8129963. The next prime is 8129999. The reversal of 8129992 is 2999218.

It can be written as a sum of positive squares in 2 ways, for example, as 8099716 + 30276 = 2846^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (8129999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38983 + ... + 39190.

Almost surely, 2^8129992 is an apocalyptic number.

It is an amenable number.

8129992 is an abundant number, since it is smaller than the sum of its proper divisors (8286548).

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

8129992 is a wasteful number, since it uses less digits than its factorization.

8129992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78192 (or 78188 counting only the distinct ones).

The product of its digits is 23328, while the sum is 40.

The square root of 8129992 is about 2851.3140830151. The cubic root of 8129992 is about 201.0774517320.

The spelling of 8129992 in words is "eight million, one hundred twenty-nine thousand, nine hundred ninety-two".