1678688 has 48 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 720000.

The previous prime is 1678687. The next prime is 1678693. The reversal of 1678688 is 8868761.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6563 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^1678688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1678688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905120).

1678688 is an abundant number, since it is smaller than the sum of its proper divisors (2131552).

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

1678688 is a wasteful number, since it uses less digits than its factorization.

1678688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 283 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 1678688 is about 1295.6419258422. The cubic root of 1678688 is about 118.8474848626.

The spelling of 1678688 in words is "one million, six hundred seventy-eight thousand, six hundred eighty-eight".