26978943 has 16 divisors (see below), whose sum is σ = 37007712. Its totient is φ = 17472000.

The previous prime is 26978923. The next prime is 26978947. The reversal of 26978943 is 34987962.

It is not a de Polignac number, because 26978943 - 2¹³ = 26970751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26978892 and 26978901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26978947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51523 + ... + 52043.

It is an arithmetic number, because the mean of its divisors is an integer number (2312982).

Almost surely, 2^26978943 is an apocalyptic number.

26978943 is a deficient number, since it is larger than the sum of its proper divisors (10028769).

26978943 is a wasteful number, since it uses less digits than its factorization.

26978943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its digits is 653184, while the sum is 48.

The square root of 26978943 is about 5194.1258167280. The cubic root of 26978943 is about 299.9219908281.

The spelling of 26978943 in words is "twenty-six million, nine hundred seventy-eight thousand, nine hundred forty-three".