26189730 has 160 divisors (see below), whose sum is σ = 83635200. Its totient is φ = 5754240.

The previous prime is 26189719. The next prime is 26189743. The reversal of 26189730 is 3798162.

26189730 is a `hidden beast` number, since 2 + 618 + 9 + 7 + 30 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 175696 + ... + 175844.

It is an arithmetic number, because the mean of its divisors is an integer number (522720).

Almost surely, 2^26189730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26189730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41817600).

26189730 is an abundant number, since it is smaller than the sum of its proper divisors (57445470).

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

26189730 is a wasteful number, since it uses less digits than its factorization.

26189730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 26189730 is about 5117.5902532344. The cubic root of 26189730 is about 296.9684692575.

The spelling of 26189730 in words is "twenty-six million, one hundred eighty-nine thousand, seven hundred thirty".