198801720 has 192 divisors, whose sum is σ = 704077920. Its totient is φ = 48356352.

The previous prime is 198801697. The next prime is 198801761. The reversal of 198801720 is 27108891.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500562 + ... + 500958.

Almost surely, 2^198801720 is an apocalyptic number.

198801720 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 198801720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352038960).

198801720 is an abundant number, since it is smaller than the sum of its proper divisors (505276200).

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

198801720 is a wasteful number, since it uses less digits than its factorization.

198801720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 198801720 is about 14099.7063799215. The cubic root of 198801720 is about 583.6332766758.

The spelling of 198801720 in words is "one hundred ninety-eight million, eight hundred one thousand, seven hundred twenty".