7991892 has 24 divisors (see below), whose sum is σ = 20720000. Its totient is φ = 2663928.

The previous prime is 7991891. The next prime is 7991897. The reversal of 7991892 is 2981997.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36892 + ... + 37107.

Almost surely, 2^7991892 is an apocalyptic number.

It is an amenable number.

7991892 is an abundant number, since it is smaller than the sum of its proper divisors (12728108).

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

7991892 is a wasteful number, since it uses less digits than its factorization.

7991892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74012 (or 74004 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 7991892 is about 2826.9934559528. The cubic root of 7991892 is about 199.9324104942.

The spelling of 7991892 in words is "seven million, nine hundred ninety-one thousand, eight hundred ninety-two".