1678244 has 6 divisors (see below), whose sum is σ = 2936934. Its totient is φ = 839120.

The previous prime is 1678231. The next prime is 1678249. The reversal of 1678244 is 4428761.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 262144 = 1190^2 + 512^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1678244.

It is not an unprimeable number, because it can be changed into a prime (1678249) 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, 209777 + ... + 209784.

It is an arithmetic number, because the mean of its divisors is an integer number (489489).

2^1678244 is an apocalyptic number.

It is an amenable number.

1678244 is a deficient number, since it is larger than the sum of its proper divisors (1258690).

1678244 is a wasteful number, since it uses less digits than its factorization.

1678244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419565 (or 419563 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 1678244 is about 1295.4705708738. The cubic root of 1678244 is about 118.8370058583.

The spelling of 1678244 in words is "one million, six hundred seventy-eight thousand, two hundred forty-four".