26978193 has 12 divisors (see below), whose sum is σ = 42511248. Its totient is φ = 16350360.

The previous prime is 26978191. The next prime is 26978197. The reversal of 26978193 is 39187962.

It is not a de Polignac number, because 26978193 - 2¹ = 26978191 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26978191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136155 + ... + 136352.

It is an arithmetic number, because the mean of its divisors is an integer number (3542604).

Almost surely, 2^26978193 is an apocalyptic number.

It is an amenable number.

26978193 is a deficient number, since it is larger than the sum of its proper divisors (15533055).

26978193 is a wasteful number, since it uses less digits than its factorization.

26978193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272524 (or 272521 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 26978193 is about 5194.0536192843. The cubic root of 26978193 is about 299.9192115794.

The spelling of 26978193 in words is "twenty-six million, nine hundred seventy-eight thousand, one hundred ninety-three".