1681308 has 18 divisors (see below), whose sum is σ = 4250064. Its totient is φ = 560424.

The previous prime is 1681307. The next prime is 1681321. The reversal of 1681308 is 8031861.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23316 + ... + 23387.

2^1681308 is an apocalyptic number.

1681308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1681308 is an abundant number, since it is smaller than the sum of its proper divisors (2568756).

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

1681308 is a wasteful number, since it uses less digits than its factorization.

1681308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46713 (or 46708 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1681308 is about 1296.6526134628. The cubic root of 1681308 is about 118.9092828373.

The spelling of 1681308 in words is "one million, six hundred eighty-one thousand, three hundred eight".