2991908 has 6 divisors (see below), whose sum is σ = 5235846. Its totient is φ = 1495952.

The previous prime is 2991907. The next prime is 2991917. The reversal of 2991908 is 8091992.

2991908 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 only one way, i.e., 1532644 + 1459264 = 1238^2 + 1208^2 .

It is not an unprimeable number, because it can be changed into a prime (2991907) 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 as a sum of consecutive naturals, namely, 373985 + ... + 373992.

It is an arithmetic number, because the mean of its divisors is an integer number (872641).

2^2991908 is an apocalyptic number.

It is an amenable number.

2991908 is a deficient number, since it is larger than the sum of its proper divisors (2243938).

2991908 is a wasteful number, since it uses less digits than its factorization.

2991908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747981 (or 747979 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2991908 is about 1729.7132710366. The cubic root of 2991908 is about 144.0951660028.

The spelling of 2991908 in words is "two million, nine hundred ninety-one thousand, nine hundred eight".