198541810 has 32 divisors (see below), whose sum is σ = 382983552. Its totient is φ = 73839360.

The previous prime is 198541807. The next prime is 198541813. The reversal of 198541810 is 18145891.

It is an interprime number because it is at equal distance from previous prime (198541807) and next prime (198541813).

It is a super-2 number, since 2×198541810² = 78837700636152200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198541810.

It is not an unprimeable number, because it can be changed into a prime (198541813) 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, 7075 + ... + 21145.

It is an arithmetic number, because the mean of its divisors is an integer number (11968236).

Almost surely, 2^198541810 is an apocalyptic number.

198541810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198541810 is a deficient number, since it is larger than the sum of its proper divisors (184441742).

198541810 is a wasteful number, since it uses less digits than its factorization.

198541810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14178.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 198541810 is about 14090.4865068599. The cubic root of 198541810 is about 583.3788216681.

The spelling of 198541810 in words is "one hundred ninety-eight million, five hundred forty-one thousand, eight hundred ten".