2991992 has 8 divisors (see below), whose sum is σ = 5610000. Its totient is φ = 1495992.

The previous prime is 2991971. The next prime is 2992007.

2991992 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2991992² = 17904032256128, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 186992 + ... + 187007.

It is an arithmetic number, because the mean of its divisors is an integer number (701250).

2^2991992 is an apocalyptic number.

It is an amenable number.

2991992 is a deficient number, since it is larger than the sum of its proper divisors (2618008).

2991992 is a wasteful number, since it uses less digits than its factorization.

2991992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374005 (or 374001 counting only the distinct ones).

The product of its digits is 26244, while the sum is 41.

The square root of 2991992 is about 1729.7375523472. The cubic root of 2991992 is about 144.0965145158.

The spelling of 2991992 in words is "two million, nine hundred ninety-one thousand, nine hundred ninety-two".