26638656 has 56 divisors (see below), whose sum is σ = 76894944. Its totient is φ = 8071680.

The previous prime is 26638637. The next prime is 26638663. The reversal of 26638656 is 65683662.

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 7 ways as a sum of consecutive naturals, for example, 4195 + ... + 8418.

It is an arithmetic number, because the mean of its divisors is an integer number (1373124).

Almost surely, 2^26638656 is an apocalyptic number.

It is an amenable number.

26638656 is an abundant number, since it is smaller than the sum of its proper divisors (50256288).

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

26638656 is a wasteful number, since it uses less digits than its factorization.

26638656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12639 (or 12629 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 26638656 is about 5161.2649612280. The cubic root of 26638656 is about 298.6556738443.

The spelling of 26638656 in words is "twenty-six million, six hundred thirty-eight thousand, six hundred fifty-six".