26428891 has 2 divisors, whose sum is σ = 26428892. Its totient is φ = 26428890.

The previous prime is 26428879. The next prime is 26428907. The reversal of 26428891 is 19882462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26428891 - 2⁹ = 26428379 is a prime.

It is not a weakly prime, because it can be changed into another prime (26428091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13214445 + 13214446.

It is an arithmetic number, because the mean of its divisors is an integer number (13214446).

Almost surely, 2^26428891 is an apocalyptic number.

26428891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26428891 is an equidigital number, since it uses as much as digits as its factorization.

26428891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 26428891 is about 5140.9037143288. The cubic root of 26428891 is about 297.8696898843.

The spelling of 26428891 in words is "twenty-six million, four hundred twenty-eight thousand, eight hundred ninety-one".