26401728 has 56 divisors (see below), whose sum is σ = 70307200. Its totient is φ = 8743680.

The previous prime is 26401717. The next prime is 26401741. The reversal of 26401728 is 82710462.

It is a junction number, because it is equal to n+sod(n) for n = 26401695 and 26401704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37863 + ... + 38553.

Almost surely, 2^26401728 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 26401728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35153600).

26401728 is an abundant number, since it is smaller than the sum of its proper divisors (43905472).

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

26401728 is a wasteful number, since it uses less digits than its factorization.

26401728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 26401728 is about 5138.2611844864. The cubic root of 26401728 is about 297.7676070551.

The spelling of 26401728 in words is "twenty-six million, four hundred one thousand, seven hundred twenty-eight".