198739136 has 112 divisors (see below), whose sum is σ = 437814720. Its totient is φ = 89210880.

The previous prime is 198739127. The next prime is 198739141. The reversal of 198739136 is 631937891.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2232980 + ... + 2233068.

It is an arithmetic number, because the mean of its divisors is an integer number (3909060).

Almost surely, 2^198739136 is an apocalyptic number.

198739136 is a gapful number since it is divisible by the number (16) 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 198739136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218907360).

198739136 is an abundant number, since it is smaller than the sum of its proper divisors (239075584).

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

198739136 is a wasteful number, since it uses less digits than its factorization.

198739136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 192 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The square root of 198739136 is about 14097.4868682329. The cubic root of 198739136 is about 583.5720264704.

The spelling of 198739136 in words is "one hundred ninety-eight million, seven hundred thirty-nine thousand, one hundred thirty-six".