26489139 has 4 divisors (see below), whose sum is σ = 35318856. Its totient is φ = 17659424.

The previous prime is 26489137. The next prime is 26489149. The reversal of 26489139 is 93198462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26489139 - 2¹ = 26489137 is a prime.

It is a super-2 number, since 2×26489139² = 1403348969922642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26489139.

It is not an unprimeable number, because it can be changed into a prime (26489131) 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, 4414854 + ... + 4414859.

It is an arithmetic number, because the mean of its divisors is an integer number (8829714).

Almost surely, 2^26489139 is an apocalyptic number.

26489139 is a deficient number, since it is larger than the sum of its proper divisors (8829717).

26489139 is an equidigital number, since it uses as much as digits as its factorization.

26489139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8829716.

The product of its digits is 93312, while the sum is 42.

The square root of 26489139 is about 5146.7600488074. The cubic root of 26489139 is about 298.0958619870.

The spelling of 26489139 in words is "twenty-six million, four hundred eighty-nine thousand, one hundred thirty-nine".