198845388 has 48 divisors (see below), whose sum is σ = 589173760. Its totient is φ = 56812752.

The previous prime is 198845351. The next prime is 198845401. The reversal of 198845388 is 883548891.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130756 + ... + 132267.

Almost surely, 2^198845388 is an apocalyptic number.

198845388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198845388 is an abundant number, since it is smaller than the sum of its proper divisors (390328372).

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

198845388 is a wasteful number, since it uses less digits than its factorization.

198845388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263043 (or 263035 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 198845388 is about 14101.2548377795. The cubic root of 198845388 is about 583.6760064069.

The spelling of 198845388 in words is "one hundred ninety-eight million, eight hundred forty-five thousand, three hundred eighty-eight".