198594890 has 32 divisors (see below), whose sum is σ = 388962000. Its totient is φ = 72566784.

The previous prime is 198594841. The next prime is 198594917. The reversal of 198594890 is 98495891.

198594890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 5968249 + 192626641 = 2443^2 + 13879^2 .

It is a super-2 number, since 2×198594890² = 78879860668224200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4736 + ... + 20484.

Almost surely, 2^198594890 is an apocalyptic number.

198594890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198594890 is a deficient number, since it is larger than the sum of its proper divisors (190367110).

198594890 is a wasteful number, since it uses less digits than its factorization.

198594890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 198594890 is about 14092.3699213440. The cubic root of 198594890 is about 583.4308056620.

The spelling of 198594890 in words is "one hundred ninety-eight million, five hundred ninety-four thousand, eight hundred ninety".