1679985198 has 20 divisors (see below), whose sum is σ = 3764411640. Its totient is φ = 559995012.

The previous prime is 1679985193. The next prime is 1679985211. The reversal of 1679985198 is 8915899761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679985191) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5184978 + ... + 5185301.

It is an arithmetic number, because the mean of its divisors is an integer number (188220582).

Almost surely, 2^1679985198 is an apocalyptic number.

1679985198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1679985198 is an abundant number, since it is smaller than the sum of its proper divisors (2084426442).

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

1679985198 is a wasteful number, since it uses less digits than its factorization.

1679985198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370293 (or 10370284 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 63.

The square root of 1679985198 is about 40987.6224975297. The cubic root of 1679985198 is about 1188.7808991958.

The spelling of 1679985198 in words is "one billion, six hundred seventy-nine million, nine hundred eighty-five thousand, one hundred ninety-eight".