198430771 has 16 divisors (see below), whose sum is σ = 247979520. Its totient is φ = 154255680.

The previous prime is 198430759. The next prime is 198430787. The reversal of 198430771 is 177034891.

It is a cyclic number.

It is not a de Polignac number, because 198430771 - 2⁷ = 198430643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198433771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32370 + ... + 38008.

It is an arithmetic number, because the mean of its divisors is an integer number (15498720).

Almost surely, 2^198430771 is an apocalyptic number.

198430771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198430771 is a deficient number, since it is larger than the sum of its proper divisors (49548749).

198430771 is a wasteful number, since it uses less digits than its factorization.

198430771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 198430771 is about 14086.5457440779. The cubic root of 198430771 is about 583.2700454514.

The spelling of 198430771 in words is "one hundred ninety-eight million, four hundred thirty thousand, seven hundred seventy-one".