26728349 has 4 divisors (see below), whose sum is σ = 26868480. Its totient is φ = 26588220.

The previous prime is 26728333. The next prime is 26728363. The reversal of 26728349 is 94382762.

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 26728349 - 2⁴ = 26728333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69779 + ... + 70160.

It is an arithmetic number, because the mean of its divisors is an integer number (6717120).

Almost surely, 2^26728349 is an apocalyptic number.

It is an amenable number.

26728349 is a deficient number, since it is larger than the sum of its proper divisors (140131).

26728349 is a wasteful number, since it uses less digits than its factorization.

26728349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140130.

The product of its digits is 145152, while the sum is 41.

The square root of 26728349 is about 5169.9467115242. The cubic root of 26728349 is about 298.9904919740.

The spelling of 26728349 in words is "twenty-six million, seven hundred twenty-eight thousand, three hundred forty-nine".