1678804 has 6 divisors (see below), whose sum is σ = 2937914. Its totient is φ = 839400.

The previous prime is 1678777. The next prime is 1678837. The reversal of 1678804 is 4088761.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1587600 + 91204 = 1260^2 + 302^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1678804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209847 + ... + 209854.

2^1678804 is an apocalyptic number.

It is an amenable number.

1678804 is a deficient number, since it is larger than the sum of its proper divisors (1259110).

1678804 is a wasteful number, since it uses less digits than its factorization.

1678804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419705 (or 419703 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1678804 is about 1295.6866905236. The cubic root of 1678804 is about 118.8502223160.

The spelling of 1678804 in words is "one million, six hundred seventy-eight thousand, eight hundred four".