26728831 has 2 divisors, whose sum is σ = 26728832. Its totient is φ = 26728830.

The previous prime is 26728787. The next prime is 26728859. The reversal of 26728831 is 13882762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26728831 - 2¹⁵ = 26696063 is a prime.

It is a super-2 number, since 2×26728831² = 1428860813253122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26728631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364415 + 13364416.

It is an arithmetic number, because the mean of its divisors is an integer number (13364416).

Almost surely, 2^26728831 is an apocalyptic number.

26728831 is a deficient number, since it is larger than the sum of its proper divisors (1).

26728831 is an equidigital number, since it uses as much as digits as its factorization.

26728831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 26728831 is about 5169.9933268816. The cubic root of 26728831 is about 298.9922892237.

The spelling of 26728831 in words is "twenty-six million, seven hundred twenty-eight thousand, eight hundred thirty-one".