2991938 has 8 divisors (see below), whose sum is σ = 4495932. Its totient is φ = 1493296.

The previous prime is 2991929. The next prime is 2991971. The reversal of 2991938 is 8391992.

2991938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2982529 + 9409 = 1727^2 + 97^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2991895 and 2991904.

It is an unprimeable number.

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, 656 + ... + 2532.

2^2991938 is an apocalyptic number.

2991938 is a deficient number, since it is larger than the sum of its proper divisors (1503994).

2991938 is a wasteful number, since it uses less digits than its factorization.

2991938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676.

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

The square root of 2991938 is about 1729.7219429723. The cubic root of 2991938 is about 144.0956476175.

The spelling of 2991938 in words is "two million, nine hundred ninety-one thousand, nine hundred thirty-eight".