26716391 has 4 divisors (see below), whose sum is σ = 28771512. Its totient is φ = 24661272.

The previous prime is 26716381. The next prime is 26716423. The reversal of 26716391 is 19361762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26716391 - 2¹⁴ = 26700007 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 (26716301) 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, 1027541 + ... + 1027566.

It is an arithmetic number, because the mean of its divisors is an integer number (7192878).

Almost surely, 2^26716391 is an apocalyptic number.

26716391 is a deficient number, since it is larger than the sum of its proper divisors (2055121).

26716391 is a wasteful number, since it uses less digits than its factorization.

26716391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055120.

The product of its digits is 13608, while the sum is 35.

The square root of 26716391 is about 5168.7900905338. The cubic root of 26716391 is about 298.9458968561.

The spelling of 26716391 in words is "twenty-six million, seven hundred sixteen thousand, three hundred ninety-one".