26565630 has 128 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 5432832.

The previous prime is 26565613. The next prime is 26565673. The reversal of 26565630 is 3656562.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26565591 and 26565600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100879 + ... + 101141.

It is an arithmetic number, because the mean of its divisors is an integer number (632016).

Almost surely, 2^26565630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26565630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024).

26565630 is an abundant number, since it is smaller than the sum of its proper divisors (54332418).

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

26565630 is a wasteful number, since it uses less digits than its factorization.

26565630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 26565630 is about 5154.1856776798. The cubic root of 26565630 is about 298.3825170585.

The spelling of 26565630 in words is "twenty-six million, five hundred sixty-five thousand, six hundred thirty".