1681008 has 40 divisors (see below), whose sum is σ = 4963968. Its totient is φ = 480192.

The previous prime is 1681007. The next prime is 1681027. The reversal of 1681008 is 8001861.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681003) 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, 2166 + ... + 2837.

2^1681008 is an apocalyptic number.

It is an amenable number.

1681008 is an abundant number, since it is smaller than the sum of its proper divisors (3282960).

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

1681008 is a wasteful number, since it uses less digits than its factorization.

1681008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021 (or 5015 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1681008 is about 1296.5369258143. The cubic root of 1681008 is about 118.9022099895.

Adding to 1681008 its reverse (8001861), we get a palindrome (9682869).

It can be divided in two parts, 168 and 1008, that added together give a triangular number (1176 = T₄₈).

The spelling of 1681008 in words is "one million, six hundred eighty-one thousand, eight".