1698481806 has 48 divisors (see below), whose sum is σ = 3963325824. Its totient is φ = 485251704.

The previous prime is 1698481787. The next prime is 1698481819. The reversal of 1698481806 is 6081848961.

1698481806 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92421 + ... + 109263.

It is an arithmetic number, because the mean of its divisors is an integer number (82569288).

Almost surely, 2^1698481806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1698481806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1981662912).

1698481806 is an abundant number, since it is smaller than the sum of its proper divisors (2264844018).

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

1698481806 is an frugal number, since it uses more digits than its factorization.

1698481806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16883 (or 16855 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 1698481806 is about 41212.6413373373. The cubic root of 1698481806 is about 1193.1278039516.

It can be divided in two parts, 16984 and 81806, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 1698481806 in words is "one billion, six hundred ninety-eight million, four hundred eighty-one thousand, eight hundred six".