198211928 has 8 divisors (see below), whose sum is σ = 371647380. Its totient is φ = 99105960.

The previous prime is 198211919. The next prime is 198211961. The reversal of 198211928 is 829112891.

It is a happy number.

198211928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12388238 + ... + 12388253.

Almost surely, 2^198211928 is an apocalyptic number.

It is an amenable number.

198211928 is a deficient number, since it is larger than the sum of its proper divisors (173435452).

198211928 is a wasteful number, since it uses less digits than its factorization.

198211928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24776497 (or 24776493 counting only the distinct ones).

The product of its digits is 20736, while the sum is 41.

The square root of 198211928 is about 14078.7757990530. The cubic root of 198211928 is about 583.0555432353.

The spelling of 198211928 in words is "one hundred ninety-eight million, two hundred eleven thousand, nine hundred twenty-eight".