26728399 has 2 divisors, whose sum is σ = 26728400. Its totient is φ = 26728398.

The previous prime is 26728379. The next prime is 26728411. The reversal of 26728399 is 99382762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26728399 - 2⁵ = 26728367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26728379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364199 + 13364200.

It is an arithmetic number, because the mean of its divisors is an integer number (13364200).

Almost surely, 2^26728399 is an apocalyptic number.

26728399 is a deficient number, since it is larger than the sum of its proper divisors (1).

26728399 is an equidigital number, since it uses as much as digits as its factorization.

26728399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 26728399 is about 5169.9515471617. The cubic root of 26728399 is about 298.9906784117.

The spelling of 26728399 in words is "twenty-six million, seven hundred twenty-eight thousand, three hundred ninety-nine".