198889136 has 20 divisors (see below), whose sum is σ = 390228000. Its totient is φ = 98185152.

The previous prime is 198889129. The next prime is 198889199. The reversal of 198889136 is 631988891.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77411 + ... + 79938.

It is an arithmetic number, because the mean of its divisors is an integer number (19511400).

Almost surely, 2^198889136 is an apocalyptic number.

198889136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198889136 is a deficient number, since it is larger than the sum of its proper divisors (191338864).

198889136 is a wasteful number, since it uses less digits than its factorization.

198889136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157436 (or 157430 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 198889136 is about 14102.8059619354. The cubic root of 198889136 is about 583.7188081465.

The spelling of 198889136 in words is "one hundred ninety-eight million, eight hundred eighty-nine thousand, one hundred thirty-six".