26381638 has 8 divisors (see below), whose sum is σ = 39603960. Its totient is φ = 13180320.

The previous prime is 26381627. The next prime is 26381653. The reversal of 26381638 is 83618362.

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

It is a junction number, because it is equal to n+sod(n) for n = 26381597 and 26381606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603 + ... + 7438.

It is an arithmetic number, because the mean of its divisors is an integer number (4950495).

Almost surely, 2^26381638 is an apocalyptic number.

26381638 is a deficient number, since it is larger than the sum of its proper divisors (13222322).

26381638 is a wasteful number, since it uses less digits than its factorization.

26381638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10502.

The product of its digits is 41472, while the sum is 37.

The square root of 26381638 is about 5136.3058709543. The cubic root of 26381638 is about 297.6920606210.

The spelling of 26381638 in words is "twenty-six million, three hundred eighty-one thousand, six hundred thirty-eight".