198622940 has 48 divisors (see below), whose sum is σ = 444552192. Its totient is φ = 74369856.

The previous prime is 198622937. The next prime is 198622967. The reversal of 198622940 is 49226891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17027 + ... + 26213.

It is an arithmetic number, because the mean of its divisors is an integer number (9261504).

Almost surely, 2^198622940 is an apocalyptic number.

198622940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198622940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222276096).

198622940 is an abundant number, since it is smaller than the sum of its proper divisors (245929252).

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

198622940 is a wasteful number, since it uses less digits than its factorization.

198622940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9266 (or 9264 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 198622940 is about 14093.3651056091. The cubic root of 198622940 is about 583.4582727395.

The spelling of 198622940 in words is "one hundred ninety-eight million, six hundred twenty-two thousand, nine hundred forty".