26982391 has 4 divisors (see below), whose sum is σ = 26992800. Its totient is φ = 26971984.

The previous prime is 26982377. The next prime is 26982401. The reversal of 26982391 is 19328962.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26982391 - 2⁵ = 26982359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26980391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130 + ... + 7648.

It is an arithmetic number, because the mean of its divisors is an integer number (6748200).

Almost surely, 2^26982391 is an apocalyptic number.

26982391 is a deficient number, since it is larger than the sum of its proper divisors (10409).

26982391 is an equidigital number, since it uses as much as digits as its factorization.

26982391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10408.

The product of its digits is 46656, while the sum is 40.

The square root of 26982391 is about 5194.4577195315. The cubic root of 26982391 is about 299.9347672982.

The spelling of 26982391 in words is "twenty-six million, nine hundred eighty-two thousand, three hundred ninety-one".