26390849 has 4 divisors (see below), whose sum is σ = 26403540. Its totient is φ = 26378160.

The previous prime is 26390813. The next prime is 26390909. The reversal of 26390849 is 94809362.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94809362 = 2 ⋅47404681.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 11950849 = 3800^2 + 3457^2 .

It is a cyclic number.

It is not a de Polignac number, because 26390849 - 2¹² = 26386753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26390549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2414 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (6600885).

Almost surely, 2^26390849 is an apocalyptic number.

It is an amenable number.

26390849 is a deficient number, since it is larger than the sum of its proper divisors (12691).

26390849 is a wasteful number, since it uses less digits than its factorization.

26390849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12690.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 26390849 is about 5137.2024488042. The cubic root of 26390849 is about 297.7267024239.

The spelling of 26390849 in words is "twenty-six million, three hundred ninety thousand, eight hundred forty-nine".