198805632 has 64 divisors (see below), whose sum is σ = 532072800. Its totient is φ = 65767424.

The previous prime is 198805627. The next prime is 198805637. The reversal of 198805632 is 236508891.

It is an interprime number because it is at equal distance from previous prime (198805627) and next prime (198805637).

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198805637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50719 + ... + 54497.

Almost surely, 2^198805632 is an apocalyptic number.

198805632 is a gapful number since it is divisible by the number (12) 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 198805632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266036400).

198805632 is an abundant number, since it is smaller than the sum of its proper divisors (333267168).

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

198805632 is a wasteful number, since it uses less digits than its factorization.

198805632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3921 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 198805632 is about 14099.8451055322. The cubic root of 198805632 is about 583.6371048761.

The spelling of 198805632 in words is "one hundred ninety-eight million, eight hundred five thousand, six hundred thirty-two".