198881340 has 48 divisors (see below), whose sum is σ = 636421632. Its totient is φ = 45458496.

The previous prime is 198881323. The next prime is 198881359. The reversal of 198881340 is 43188891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 198881292 and 198881301.

It is a congruent number.

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, 236344 + ... + 237183.

It is an arithmetic number, because the mean of its divisors is an integer number (13258784).

Almost surely, 2^198881340 is an apocalyptic number.

198881340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198881340 is an abundant number, since it is smaller than the sum of its proper divisors (437540292).

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

198881340 is a wasteful number, since it uses less digits than its factorization.

198881340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473546 (or 473544 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 198881340 is about 14102.5295603307. The cubic root of 198881340 is about 583.7111812320.

The spelling of 198881340 in words is "one hundred ninety-eight million, eight hundred eighty-one thousand, three hundred forty".