26978 has 16 divisors (see below), whose sum is σ = 48384. Its totient is φ = 11040.

The previous prime is 26959. The next prime is 26981. The reversal of 26978 is 87962.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 597.

It is an arithmetic number, because the mean of its divisors is an integer number (3024).

2²⁶⁹⁷⁸ is an apocalyptic number.

26978 is a deficient number, since it is larger than the sum of its proper divisors (21406).

26978 is a wasteful number, since it uses less digits than its factorization.

26978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97.

The product of its digits is 6048, while the sum is 32.

The square root of 26978 is about 164.2498097411. The cubic root of 26978 is about 29.9918496378.

The spelling of 26978 in words is "twenty-six thousand, nine hundred seventy-eight".