26990443 has 4 divisors (see below), whose sum is σ = 27007848. Its totient is φ = 26973040.

The previous prime is 26990413. The next prime is 26990459. The reversal of 26990443 is 34409962.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26990443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26990413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6121 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (6751962).

Almost surely, 2^26990443 is an apocalyptic number.

26990443 is a deficient number, since it is larger than the sum of its proper divisors (17405).

26990443 is a wasteful number, since it uses less digits than its factorization.

26990443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17404.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 26990443 is about 5195.2327185604. The cubic root of 26990443 is about 299.9645995266.

The spelling of 26990443 in words is "twenty-six million, nine hundred ninety thousand, four hundred forty-three".