198609830 has 16 divisors (see below), whose sum is σ = 373041504. Its totient is φ = 75989760.

The previous prime is 198609811. The next prime is 198609833. The reversal of 198609830 is 38906891.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198609833) 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, 431531 + ... + 431990.

It is an arithmetic number, because the mean of its divisors is an integer number (23315094).

Almost surely, 2^198609830 is an apocalyptic number.

198609830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198609830 is a deficient number, since it is larger than the sum of its proper divisors (174431674).

198609830 is a wasteful number, since it uses less digits than its factorization.

198609830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863551.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 198609830 is about 14092.8999854537. The cubic root of 198609830 is about 583.4454355075.

The spelling of 198609830 in words is "one hundred ninety-eight million, six hundred nine thousand, eight hundred thirty".