1678864 has 20 divisors (see below), whose sum is σ = 3548880. Its totient is φ = 763040.

The previous prime is 1678861. The next prime is 1678871. The reversal of 1678864 is 4688761.

It is not an unprimeable number, because it can be changed into a prime (1678861) 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, 4594 + ... + 4945.

It is an arithmetic number, because the mean of its divisors is an integer number (177444).

2^1678864 is an apocalyptic number.

It is an amenable number.

1678864 is an abundant number, since it is smaller than the sum of its proper divisors (1870016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1678864 is a wasteful number, since it uses less digits than its factorization.

1678864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9558 (or 9552 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 1678864 is about 1295.7098440623. The cubic root of 1678864 is about 118.8516381908.

The spelling of 1678864 in words is "one million, six hundred seventy-eight thousand, eight hundred sixty-four".