891606198 has 32 divisors (see below), whose sum is σ = 2145219840. Its totient is φ = 241336800.

The previous prime is 891606197. The next prime is 891606223.

891606198 is nontrivially palindromic in base 10.

891606198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×891606198² = 1589923224624030408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891606193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 557853 + ... + 559448.

It is an arithmetic number, because the mean of its divisors is an integer number (67038120).

Almost surely, 2^891606198 is an apocalyptic number.

891606198 is an abundant number, since it is smaller than the sum of its proper divisors (1253613642).

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

891606198 is a wasteful number, since it uses less digits than its factorization.

891606198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117332.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 891606198 is about 29859.7755852250. The cubic root of 891606198 is about 962.4784763388.

The spelling of 891606198 in words is "eight hundred ninety-one million, six hundred six thousand, one hundred ninety-eight".