26396391 has 16 divisors (see below), whose sum is σ = 40439808. Its totient is φ = 15002400.

The previous prime is 26396371. The next prime is 26396401. The reversal of 26396391 is 19369362.

It is not a de Polignac number, because 26396391 - 2⁶ = 26396327 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26396371) 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, 721 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (2527488).

Almost surely, 2^26396391 is an apocalyptic number.

26396391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26396391 is a deficient number, since it is larger than the sum of its proper divisors (14043417).

26396391 is a wasteful number, since it uses less digits than its factorization.

26396391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6782.

The product of its digits is 52488, while the sum is 39.

The square root of 26396391 is about 5137.7418191264. The cubic root of 26396391 is about 297.7475415400.

The spelling of 26396391 in words is "twenty-six million, three hundred ninety-six thousand, three hundred ninety-one".