198393790 has 16 divisors (see below), whose sum is σ = 408124512. Its totient is φ = 68020704.

The previous prime is 198393751. The next prime is 198393817. The reversal of 198393790 is 97393891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417029 + ... + 1417168.

It is an arithmetic number, because the mean of its divisors is an integer number (25507782).

Almost surely, 2^198393790 is an apocalyptic number.

198393790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198393790 is an abundant number, since it is smaller than the sum of its proper divisors (209730722).

198393790 is a wasteful number, since it uses less digits than its factorization.

198393790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834211.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 198393790 is about 14085.2330474153. The cubic root of 198393790 is about 583.2338090526.

The spelling of 198393790 in words is "one hundred ninety-eight million, three hundred ninety-three thousand, seven hundred ninety".