26328409 has 4 divisors (see below), whose sum is σ = 26661760. Its totient is φ = 25995060.

The previous prime is 26328403. The next prime is 26328451. The reversal of 26328409 is 90482362.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90482362 = 2 ⋅45241181.

It is a cyclic number.

It is not a de Polignac number, because 26328409 - 2¹¹ = 26326361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26328403) 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, 166557 + ... + 166714.

It is an arithmetic number, because the mean of its divisors is an integer number (6665440).

Almost surely, 2^26328409 is an apocalyptic number.

It is an amenable number.

26328409 is a deficient number, since it is larger than the sum of its proper divisors (333351).

26328409 is an equidigital number, since it uses as much as digits as its factorization.

26328409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333350.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 26328409 is about 5131.1216122793. The cubic root of 26328409 is about 297.4917126896.

The spelling of 26328409 in words is "twenty-six million, three hundred twenty-eight thousand, four hundred nine".