26378681 has 8 divisors (see below), whose sum is σ = 30180480. Its totient is φ = 22585248.

The previous prime is 26378663. The next prime is 26378687. The reversal of 26378681 is 18687362.

It is a happy number.

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

It is not a de Polignac number, because 26378681 - 2⁶ = 26378617 is a prime.

It is a super-2 number, since 2×26378681² = 1391669622599522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26378687) 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 7 ways as a sum of consecutive naturals, for example, 7805 + ... + 10661.

It is an arithmetic number, because the mean of its divisors is an integer number (3772560).

Almost surely, 2^26378681 is an apocalyptic number.

It is an amenable number.

26378681 is a deficient number, since it is larger than the sum of its proper divisors (3801799).

26378681 is a wasteful number, since it uses less digits than its factorization.

26378681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183.

The product of its digits is 96768, while the sum is 41.

The square root of 26378681 is about 5136.0180100930. The cubic root of 26378681 is about 297.6809378808.

The spelling of 26378681 in words is "twenty-six million, three hundred seventy-eight thousand, six hundred eighty-one".