2139644 has 24 divisors (see below), whose sum is σ = 4210080. Its totient is φ = 944064.

The previous prime is 2139611. The next prime is 2139653. The reversal of 2139644 is 4469312.

2139644 is nontrivially palindromic in base 12.

2139644 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 302 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (175420).

2^2139644 is an apocalyptic number.

It is an amenable number.

2139644 is a deficient number, since it is larger than the sum of its proper divisors (2070436).

2139644 is a wasteful number, since it uses less digits than its factorization.

2139644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1827 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 2139644 is about 1462.7522004769. The cubic root of 2139644 is about 128.8587280244.

The spelling of 2139644 in words is "two million, one hundred thirty-nine thousand, six hundred forty-four".