26342991 has 12 divisors (see below), whose sum is σ = 39363480. Its totient is φ = 16956240.

The previous prime is 26342989. The next prime is 26343029. The reversal of 26342991 is 19924362.

It is not a de Polignac number, because 26342991 - 2¹ = 26342989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26342941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50205 + ... + 50726.

It is an arithmetic number, because the mean of its divisors is an integer number (3280290).

Almost surely, 2^26342991 is an apocalyptic number.

26342991 is a deficient number, since it is larger than the sum of its proper divisors (13020489).

26342991 is a wasteful number, since it uses less digits than its factorization.

26342991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100966 (or 100963 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 26342991 is about 5132.5423524799. The cubic root of 26342991 is about 297.5466245218.

It can be divided in two parts, 2634 and 2991, that added together give a square (5625 = 75²).

The spelling of 26342991 in words is "twenty-six million, three hundred forty-two thousand, nine hundred ninety-one".