198992880 has 120 divisors (see below), whose sum is σ = 671178768. Its totient is φ = 52835328.

The previous prime is 198992879. The next prime is 198992891. The reversal of 198992880 is 88299891.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224919 + ... + 225801.

Almost surely, 2^198992880 is an apocalyptic number.

198992880 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 198992880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335589384).

198992880 is an abundant number, since it is smaller than the sum of its proper divisors (472185888).

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

198992880 is a wasteful number, since it uses less digits than its factorization.

198992880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The square root of 198992880 is about 14106.4836156996. The cubic root of 198992880 is about 583.8202831005.

The spelling of 198992880 in words is "one hundred ninety-eight million, nine hundred ninety-two thousand, eight hundred eighty".