26419889 has 4 divisors (see below), whose sum is σ = 26430756. Its totient is φ = 26409024.

The previous prime is 26419879. The next prime is 26419919. The reversal of 26419889 is 98891462.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98891462 = 2 ⋅49445731.

It can be written as a sum of positive squares in 2 ways, for example, as 1669264 + 24750625 = 1292^2 + 4975^2 .

It is a cyclic number.

It is not a de Polignac number, because 26419889 - 2⁴ = 26419873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26419829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77 + ... + 7269.

It is an arithmetic number, because the mean of its divisors is an integer number (6607689).

Almost surely, 2^26419889 is an apocalyptic number.

It is an amenable number.

26419889 is a deficient number, since it is larger than the sum of its proper divisors (10867).

26419889 is an equidigital number, since it uses as much as digits as its factorization.

26419889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10866.

The product of its digits is 248832, while the sum is 47.

The square root of 26419889 is about 5140.0281127636. The cubic root of 26419889 is about 297.8358667038.

It can be divided in two parts, 2 and 6419889, that multiplied together give a triangular number (12839778 = T₅₀₆₇).

The spelling of 26419889 in words is "twenty-six million, four hundred nineteen thousand, eight hundred eighty-nine".