1681340304 has 160 divisors (see below), whose sum is σ = 5162844160. Its totient is φ = 461376000.

The previous prime is 1681340303. The next prime is 1681340357. The reversal of 1681340304 is 4030431861.

It is not an unprimeable number, because it can be changed into a prime (1681340303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1572282 + ... + 1573350.

It is an arithmetic number, because the mean of its divisors is an integer number (32267776).

Almost surely, 2^1681340304 is an apocalyptic number.

1681340304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681340304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2581422080).

1681340304 is an abundant number, since it is smaller than the sum of its proper divisors (3481503856).

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

1681340304 is a wasteful number, since it uses less digits than its factorization.

1681340304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1681340304 is about 41004.1498387663. The cubic root of 1681340304 is about 1189.1004439140.

The spelling of 1681340304 in words is "one billion, six hundred eighty-one million, three hundred forty thousand, three hundred four".