26440679 has 4 divisors (see below), whose sum is σ = 26835384. Its totient is φ = 26045976.

The previous prime is 26440651. The next prime is 26440717. The reversal of 26440679 is 97604462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97604462 = 2 ⋅48802231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26440679 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 (26440619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197252 + ... + 197385.

It is an arithmetic number, because the mean of its divisors is an integer number (6708846).

Almost surely, 2^26440679 is an apocalyptic number.

26440679 is a deficient number, since it is larger than the sum of its proper divisors (394705).

26440679 is an equidigital number, since it uses as much as digits as its factorization.

26440679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394704.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 26440679 is about 5142.0500775469. The cubic root of 26440679 is about 297.9139692802.

The spelling of 26440679 in words is "twenty-six million, four hundred forty thousand, six hundred seventy-nine".