26109198 has 48 divisors (see below), whose sum is σ = 58687200. Its totient is φ = 8382528.

The previous prime is 26109191. The next prime is 26109203. The reversal of 26109198 is 89190162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26109191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131103 + ... + 131301.

It is an arithmetic number, because the mean of its divisors is an integer number (1222650).

Almost surely, 2^26109198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26109198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29343600).

26109198 is an abundant number, since it is smaller than the sum of its proper divisors (32578002).

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

26109198 is a wasteful number, since it uses less digits than its factorization.

26109198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 26109198 is about 5109.7160390769. The cubic root of 26109198 is about 296.6637694172.

The spelling of 26109198 in words is "twenty-six million, one hundred nine thousand, one hundred ninety-eight".