198771892 has 12 divisors (see below), whose sum is σ = 379473696. Its totient is φ = 90350840.

The previous prime is 198771841. The next prime is 198771893. The reversal of 198771892 is 298177891.

It is a pancake number, because a pancake can be divided into 198771892 parts by 19938 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198771893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258728 + ... + 2258815.

It is an arithmetic number, because the mean of its divisors is an integer number (31622808).

Almost surely, 2^198771892 is an apocalyptic number.

It is an amenable number.

198771892 is a deficient number, since it is larger than the sum of its proper divisors (180701804).

198771892 is a wasteful number, since it uses less digits than its factorization.

198771892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517558 (or 4517556 counting only the distinct ones).

The product of its digits is 508032, while the sum is 52.

The square root of 198771892 is about 14098.6485877193. The cubic root of 198771892 is about 583.6040859758.

The spelling of 198771892 in words is "one hundred ninety-eight million, seven hundred seventy-one thousand, eight hundred ninety-two".