1639244 has 12 divisors (see below), whose sum is σ = 3019800. Its totient is φ = 776448.

The previous prime is 1639243. The next prime is 1639271. The reversal of 1639244 is 4429361.

It is not an unprimeable number, because it can be changed into a prime (1639241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10709 + ... + 10860.

It is an arithmetic number, because the mean of its divisors is an integer number (251650).

2^1639244 is an apocalyptic number.

It is an amenable number.

1639244 is a deficient number, since it is larger than the sum of its proper divisors (1380556).

1639244 is a wasteful number, since it uses less digits than its factorization.

1639244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21592 (or 21590 counting only the distinct ones).

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

The square root of 1639244 is about 1280.3296450524. The cubic root of 1639244 is about 117.9092474671.

The spelling of 1639244 in words is "one million, six hundred thirty-nine thousand, two hundred forty-four".