198490149 has 64 divisors (see below), whose sum is σ = 349574400. Its totient is φ = 109728000.

The previous prime is 198490129. The next prime is 198490151. The reversal of 198490149 is 941094891.

198490149 = T₄₂ + T₄₃ + ... + T₁₀₅₉.

198490149 is a `hidden beast` number, since 19 + 8 + 490 + 149 = 666.

198490149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198490149 - 2¹² = 198486053 is a prime.

It is a super-3 number, since 3×198490149³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198490129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 389707 + ... + 390215.

It is an arithmetic number, because the mean of its divisors is an integer number (5462100).

Almost surely, 2^198490149 is an apocalyptic number.

It is an amenable number.

198490149 is a deficient number, since it is larger than the sum of its proper divisors (151084251).

198490149 is a wasteful number, since it uses less digits than its factorization.

198490149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 198490149 is about 14088.6532003595. The cubic root of 198490149 is about 583.3282184767.

The spelling of 198490149 in words is "one hundred ninety-eight million, four hundred ninety thousand, one hundred forty-nine".