198420450 has 48 divisors (see below), whose sum is σ = 493108320. Its totient is φ = 52801920.

The previous prime is 198420449. The next prime is 198420457. The reversal of 198420450 is 54024891.

It is not an unprimeable number, because it can be changed into a prime (198420457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91782 + ... + 93918.

It is an arithmetic number, because the mean of its divisors is an integer number (10273090).

Almost surely, 2^198420450 is an apocalyptic number.

198420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198420450 is an abundant number, since it is smaller than the sum of its proper divisors (294687870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198420450 is a wasteful number, since it uses less digits than its factorization.

198420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2766 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 198420450 is about 14086.1793968414. The cubic root of 198420450 is about 583.2599327145.

The spelling of 198420450 in words is "one hundred ninety-eight million, four hundred twenty thousand, four hundred fifty".