26172636 has 48 divisors (see below), whose sum is σ = 70990080. Its totient is φ = 7349760.

The previous prime is 26172631. The next prime is 26172647. The reversal of 26172636 is 63627162.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 26172597 and 26172606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26172631) 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, 2316 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (1478960).

Almost surely, 2^26172636 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 26172636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35495040).

26172636 is an abundant number, since it is smaller than the sum of its proper divisors (44817444).

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

26172636 is a wasteful number, since it uses less digits than its factorization.

26172636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5354 (or 5352 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 26172636 is about 5115.9198586373. The cubic root of 26172636 is about 296.9038448944.

Adding to 26172636 its reverse (63627162), we get a palindrome (89799798).

It can be divided in two parts, 2617 and 2636, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 26172636 in words is "twenty-six million, one hundred seventy-two thousand, six hundred thirty-six".