198420801 has 16 divisors (see below), whose sum is σ = 273543168. Its totient is φ = 127803600.

The previous prime is 198420797. The next prime is 198420823. The reversal of 198420801 is 108024891.

198420801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198420801 - 2² = 198420797 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198420851) 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, 71836 + ... + 74546.

It is an arithmetic number, because the mean of its divisors is an integer number (17096448).

Almost surely, 2^198420801 is an apocalyptic number.

198420801 is the 8133-rd octagonal number.

It is an amenable number.

198420801 is a deficient number, since it is larger than the sum of its proper divisors (75122367).

198420801 is a wasteful number, since it uses less digits than its factorization.

198420801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 198420801 is about 14086.1918558566. The cubic root of 198420801 is about 583.2602766376.

The spelling of 198420801 in words is "one hundred ninety-eight million, four hundred twenty thousand, eight hundred one".