26442239 has 4 divisors (see below), whose sum is σ = 26458824. Its totient is φ = 26425656.

The previous prime is 26442211. The next prime is 26442257. The reversal of 26442239 is 93224462.

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 26442239 - 2²⁰ = 25393663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26442209) 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, 5612 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (6614706).

Almost surely, 2^26442239 is an apocalyptic number.

26442239 is a deficient number, since it is larger than the sum of its proper divisors (16585).

26442239 is a wasteful number, since it uses less digits than its factorization.

26442239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16584.

The product of its digits is 20736, while the sum is 32.

The square root of 26442239 is about 5142.2017657809. The cubic root of 26442239 is about 297.9198281395.

Multiplying 26442239 by its sum of digits (32), we get a palindrome (846151648).

The spelling of 26442239 in words is "twenty-six million, four hundred forty-two thousand, two hundred thirty-nine".