1678028 has 18 divisors (see below), whose sum is σ = 3228708. Its totient is φ = 762520.

The previous prime is 1678021. The next prime is 1678031. The reversal of 1678028 is 8208761.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1677985 and 1678003.

It is not an unprimeable number, because it can be changed into a prime (1678021) 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 in 5 ways as a sum of consecutive naturals, for example, 1250 + ... + 2217.

2^1678028 is an apocalyptic number.

It is an amenable number.

1678028 is a deficient number, since it is larger than the sum of its proper divisors (1550680).

1678028 is a wasteful number, since it uses less digits than its factorization.

1678028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493 (or 3480 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1678028 is about 1295.3872008014. The cubic root of 1678028 is about 118.8319072961.

The spelling of 1678028 in words is "one million, six hundred seventy-eight thousand, twenty-eight".