858090198 has 128 divisors (see below), whose sum is σ = 2238382080. Its totient is φ = 213373440.

The previous prime is 858090197. The next prime is 858090281. The reversal of 858090198 is 891090858.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858090197) 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, 582603 + ... + 584073.

It is an arithmetic number, because the mean of its divisors is an integer number (17487360).

Almost surely, 2^858090198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858090198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119191040).

858090198 is an abundant number, since it is smaller than the sum of its proper divisors (1380291882).

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

858090198 is a wasteful number, since it uses less digits than its factorization.

858090198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562.

The product of its (nonzero) digits is 207360, while the sum is 48.

The square root of 858090198 is about 29293.1766457651. The cubic root of 858090198 is about 950.2640809699.

The spelling of 858090198 in words is "eight hundred fifty-eight million, ninety thousand, one hundred ninety-eight".