1139644 has 24 divisors (see below), whose sum is σ = 2217600. Its totient is φ = 508080.

The previous prime is 1139623. The next prime is 1139669. The reversal of 1139644 is 4469311.

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, 2377 + ... + 2815.

It is an arithmetic number, because the mean of its divisors is an integer number (92400).

2^1139644 is an apocalyptic number.

It is an amenable number.

1139644 is a deficient number, since it is larger than the sum of its proper divisors (1077956).

1139644 is a wasteful number, since it uses less digits than its factorization.

1139644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 511 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 1139644 is about 1067.5410999114. The cubic root of 1139644 is about 104.4535174788.

The spelling of 1139644 in words is "one million, one hundred thirty-nine thousand, six hundred forty-four".