26398013 has 8 divisors (see below), whose sum is σ = 26945856. Its totient is φ = 25855200.

The previous prime is 26398003. The next prime is 26398027. The reversal of 26398013 is 31089362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26398013 - 2⁶ = 26397949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26398003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10433 + ... + 12713.

It is an arithmetic number, because the mean of its divisors is an integer number (3368232).

Almost surely, 2^26398013 is an apocalyptic number.

It is an amenable number.

26398013 is a deficient number, since it is larger than the sum of its proper divisors (547843).

26398013 is a wasteful number, since it uses less digits than its factorization.

26398013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 26398013 is about 5137.8996681523. The cubic root of 26398013 is about 297.7536400583.

The spelling of 26398013 in words is "twenty-six million, three hundred ninety-eight thousand, thirteen".