26378538 has 8 divisors (see below), whose sum is σ = 52757088. Its totient is φ = 8792844.

The previous prime is 26378537. The next prime is 26378549. The reversal of 26378538 is 83587362.

It is a sphenic number, since it is the product of 3 distinct primes.

26378538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 26378538.

It is not an unprimeable number, because it can be changed into a prime (26378531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198206 + ... + 2198217.

It is an arithmetic number, because the mean of its divisors is an integer number (6594636).

Almost surely, 2^26378538 is an apocalyptic number.

26378538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

26378538 is a wasteful number, since it uses less digits than its factorization.

26378538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396428.

The product of its digits is 241920, while the sum is 42.

The square root of 26378538 is about 5136.0040887834. The cubic root of 26378538 is about 297.6803999660.

Subtracting from 26378538 its sum of digits (42), we obtain a square (26378496 = 5136²).

It can be divided in two parts, 2637 and 8538, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 26378538 in words is "twenty-six million, three hundred seventy-eight thousand, five hundred thirty-eight".