26538138 has 64 divisors (see below), whose sum is σ = 65894400. Its totient is φ = 7847280.

The previous prime is 26538119. The next prime is 26538143. The reversal of 26538138 is 83183562.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25023 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (1029600).

Almost surely, 2^26538138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26538138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32947200).

26538138 is an abundant number, since it is smaller than the sum of its proper divisors (39356262).

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

26538138 is a wasteful number, since it uses less digits than its factorization.

26538138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 1098 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 26538138 is about 5151.5180286979. The cubic root of 26538138 is about 298.2795523943.

The spelling of 26538138 in words is "twenty-six million, five hundred thirty-eight thousand, one hundred thirty-eight".