1680219798 has 16 divisors (see below), whose sum is σ = 3361522800. Its totient is φ = 559892736.

The previous prime is 1680219791. The next prime is 1680219829. The reversal of 1680219798 is 8979120861.

It is a self number, because there is not a number n which added to its sum of digits gives 1680219798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680219791) 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, 24223 + ... + 62826.

It is an arithmetic number, because the mean of its divisors is an integer number (210095175).

Almost surely, 2^1680219798 is an apocalyptic number.

1680219798 is an abundant number, since it is smaller than the sum of its proper divisors (1681303002).

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

1680219798 is a wasteful number, since it uses less digits than its factorization.

1680219798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90271.

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 1680219798 is about 40990.4842371983. The cubic root of 1680219798 is about 1188.8362320283.

The spelling of 1680219798 in words is "one billion, six hundred eighty million, two hundred nineteen thousand, seven hundred ninety-eight".