26840013 has 16 divisors (see below), whose sum is σ = 36460800. Its totient is φ = 17559360.

The previous prime is 26839973. The next prime is 26840071. The reversal of 26840013 is 31004862.

It is a happy number.

It is not a de Polignac number, because 26840013 - 2⁶ = 26839949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26840083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63543 + ... + 63963.

It is an arithmetic number, because the mean of its divisors is an integer number (2278800).

Almost surely, 2^26840013 is an apocalyptic number.

It is an amenable number.

26840013 is a deficient number, since it is larger than the sum of its proper divisors (9620787).

26840013 is a wasteful number, since it uses less digits than its factorization.

26840013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 26840013 is about 5180.7347934439. The cubic root of 26840013 is about 299.4062813245.

Adding to 26840013 its reverse (31004862), we get a palindrome (57844875).

The spelling of 26840013 in words is "twenty-six million, eight hundred forty thousand, thirteen".