2726391 has 4 divisors (see below), whose sum is σ = 3635192. Its totient is φ = 1817592.

The previous prime is 2726389. The next prime is 2726401. The reversal of 2726391 is 1936272.

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

It is not a de Polignac number, because 2726391 - 2¹ = 2726389 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2726491) 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, 454396 + ... + 454401.

It is an arithmetic number, because the mean of its divisors is an integer number (908798).

2^2726391 is an apocalyptic number.

2726391 is a deficient number, since it is larger than the sum of its proper divisors (908801).

2726391 is an equidigital number, since it uses as much as digits as its factorization.

2726391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908800.

The product of its digits is 4536, while the sum is 30.

The square root of 2726391 is about 1651.1786699204. The cubic root of 2726391 is about 139.6998843176.

The spelling of 2726391 in words is "two million, seven hundred twenty-six thousand, three hundred ninety-one".