26686481 has 4 divisors (see below), whose sum is σ = 28256292. Its totient is φ = 25116672.

The previous prime is 26686477. The next prime is 26686487. The reversal of 26686481 is 18468662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15928081 + 10758400 = 3991^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 26686481 - 2² = 26686477 is a prime.

It is a super-3 number, since 3×26686481³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26686487) by changing a digit.

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, 784880 + ... + 784913.

It is an arithmetic number, because the mean of its divisors is an integer number (7064073).

Almost surely, 2^26686481 is an apocalyptic number.

It is an amenable number.

26686481 is a deficient number, since it is larger than the sum of its proper divisors (1569811).

26686481 is a wasteful number, since it uses less digits than its factorization.

26686481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569810.

The product of its digits is 110592, while the sum is 41.

The square root of 26686481 is about 5165.8959532689. The cubic root of 26686481 is about 298.8342948235.

The spelling of 26686481 in words is "twenty-six million, six hundred eighty-six thousand, four hundred eighty-one".