2726381 has 4 divisors (see below), whose sum is σ = 3115872. Its totient is φ = 2336892.

The previous prime is 2726363. The next prime is 2726387. The reversal of 2726381 is 1836272.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2726381 - 2¹⁰ = 2725357 is a prime.

It is a super-2 number, since 2×2726381² = 14866306714322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2726387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194735 + ... + 194748.

It is an arithmetic number, because the mean of its divisors is an integer number (778968).

2^2726381 is an apocalyptic number.

It is an amenable number.

2726381 is a deficient number, since it is larger than the sum of its proper divisors (389491).

2726381 is an equidigital number, since it uses as much as digits as its factorization.

2726381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389490.

The product of its digits is 4032, while the sum is 29.

The square root of 2726381 is about 1651.1756417777. The cubic root of 2726381 is about 139.6997135178.

The spelling of 2726381 in words is "two million, seven hundred twenty-six thousand, three hundred eighty-one".