1698341680 has 80 divisors (see below), whose sum is σ = 4518550080. Its totient is φ = 581538816.

The previous prime is 1698341629. The next prime is 1698341681. The reversal of 1698341680 is 861438961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1698341680.

It is not an unprimeable number, because it can be changed into a prime (1698341681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597222 + ... + 600058.

It is an arithmetic number, because the mean of its divisors is an integer number (56481876).

Almost surely, 2^1698341680 is an apocalyptic number.

1698341680 is a gapful number since it is divisible by the number (10) 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 1698341680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2259275040).

1698341680 is an abundant number, since it is smaller than the sum of its proper divisors (2820208400).

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

1698341680 is a wasteful number, since it uses less digits than its factorization.

1698341680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3926 (or 3920 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1698341680 is about 41210.9412656396. The cubic root of 1698341680 is about 1193.0949917417.

The spelling of 1698341680 in words is "one billion, six hundred ninety-eight million, three hundred forty-one thousand, six hundred eighty".