198259890 has 32 divisors (see below), whose sum is σ = 476219520. Its totient is φ = 52825344.

The previous prime is 198259861. The next prime is 198259913. The reversal of 198259890 is 98952891.

198259890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 51451 + ... + 55169.

It is an arithmetic number, because the mean of its divisors is an integer number (14881860).

Almost surely, 2^198259890 is an apocalyptic number.

198259890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198259890 is an abundant number, since it is smaller than the sum of its proper divisors (277959630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198259890 is a wasteful number, since it uses less digits than its factorization.

198259890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506.

The product of its (nonzero) digits is 466560, while the sum is 51.

The square root of 198259890 is about 14080.4790401463. The cubic root of 198259890 is about 583.1025674061.

The spelling of 198259890 in words is "one hundred ninety-eight million, two hundred fifty-nine thousand, eight hundred ninety".