26438636 has 36 divisors (see below), whose sum is σ = 55090728. Its totient is φ = 11063808.

The previous prime is 26438627. The next prime is 26438647. The reversal of 26438636 is 63683462.

It is a self number, because there is not a number n which added to its sum of digits gives 26438636.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6860 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (1530298).

Almost surely, 2^26438636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26438636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27545364).

26438636 is an abundant number, since it is smaller than the sum of its proper divisors (28652092).

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

26438636 is a wasteful number, since it uses less digits than its factorization.

26438636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198 (or 3189 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 26438636 is about 5141.8514175343. The cubic root of 26438636 is about 297.9062960795.

The spelling of 26438636 in words is "twenty-six million, four hundred thirty-eight thousand, six hundred thirty-six".