26642991 has 8 divisors (see below), whose sum is σ = 35573040. Its totient is φ = 17737472.

The previous prime is 26642983. The next prime is 26643037. The reversal of 26642991 is 19924662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26642991 - 2³ = 26642983 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26642971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (4446630).

Almost surely, 2^26642991 is an apocalyptic number.

26642991 is a deficient number, since it is larger than the sum of its proper divisors (8930049).

26642991 is a wasteful number, since it uses less digits than its factorization.

26642991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265.

The product of its digits is 46656, while the sum is 39.

The square root of 26642991 is about 5161.6848993328. The cubic root of 26642991 is about 298.6718733868.

The spelling of 26642991 in words is "twenty-six million, six hundred forty-two thousand, nine hundred ninety-one".