1678844 has 6 divisors (see below), whose sum is σ = 2937984. Its totient is φ = 839420.

The previous prime is 1678843. The next prime is 1678847. The reversal of 1678844 is 4488761.

It is a junction number, because it is equal to n+sod(n) for n = 1678798 and 1678807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209852 + ... + 209859.

It is an arithmetic number, because the mean of its divisors is an integer number (489664).

2^1678844 is an apocalyptic number.

It is an amenable number.

1678844 is a deficient number, since it is larger than the sum of its proper divisors (1259140).

1678844 is a wasteful number, since it uses less digits than its factorization.

1678844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419715 (or 419713 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 1678844 is about 1295.7021262621. The cubic root of 1678844 is about 118.8511662363.

The spelling of 1678844 in words is "one million, six hundred seventy-eight thousand, eight hundred forty-four".