26171728 has 40 divisors (see below), whose sum is σ = 56826720. Its totient is φ = 11571840.

The previous prime is 26171693. The next prime is 26171729. The reversal of 26171728 is 82717162.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 26171693 and 26171702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26171729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4503 + ... + 8521.

It is an arithmetic number, because the mean of its divisors is an integer number (1420668).

Almost surely, 2^26171728 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 26171728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28413360).

26171728 is an abundant number, since it is smaller than the sum of its proper divisors (30654992).

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

26171728 is a wasteful number, since it uses less digits than its factorization.

26171728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075 (or 4069 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 26171728 is about 5115.8311152735. The cubic root of 26171728 is about 296.9004113871.

The spelling of 26171728 in words is "twenty-six million, one hundred seventy-one thousand, seven hundred twenty-eight".