2991644 has 12 divisors (see below), whose sum is σ = 5347104. Its totient is φ = 1463904.

The previous prime is 2991631. The next prime is 2991649. The reversal of 2991644 is 4461992.

2991644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991649) 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, 7769 + ... + 8144.

It is an arithmetic number, because the mean of its divisors is an integer number (445592).

2^2991644 is an apocalyptic number.

It is an amenable number.

2991644 is a deficient number, since it is larger than the sum of its proper divisors (2355460).

2991644 is a wasteful number, since it uses less digits than its factorization.

2991644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15964 (or 15962 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 2991644 is about 1729.6369561269. The cubic root of 2991644 is about 144.0909276547.

The spelling of 2991644 in words is "two million, nine hundred ninety-one thousand, six hundred forty-four".