198119790 has 128 divisors (see below), whose sum is σ = 590768640. Its totient is φ = 46828800.

The previous prime is 198119743. The next prime is 198119807. The reversal of 198119790 is 97911891.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120957 + ... + 122583.

It is an arithmetic number, because the mean of its divisors is an integer number (4615380).

Almost surely, 2^198119790 is an apocalyptic number.

198119790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198119790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295384320).

198119790 is an abundant number, since it is smaller than the sum of its proper divisors (392648850).

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

198119790 is a wasteful number, since it uses less digits than its factorization.

198119790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The square root of 198119790 is about 14075.5031881635. The cubic root of 198119790 is about 582.9651855755.

The spelling of 198119790 in words is "one hundred ninety-eight million, one hundred nineteen thousand, seven hundred ninety".