26422991 has 16 divisors (see below), whose sum is σ = 31256064. Its totient is φ = 21868704.

The previous prime is 26422987. The next prime is 26422993. The reversal of 26422991 is 19922462.

It is a cyclic number.

It is not a de Polignac number, because 26422991 - 2² = 26422987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26422993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24326 + ... + 25388.

It is an arithmetic number, because the mean of its divisors is an integer number (1953504).

Almost surely, 2^26422991 is an apocalyptic number.

26422991 is a deficient number, since it is larger than the sum of its proper divisors (4833073).

26422991 is a wasteful number, since it uses less digits than its factorization.

26422991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its digits is 15552, while the sum is 35.

The square root of 26422991 is about 5140.3298532293. The cubic root of 26422991 is about 297.8475227041.

The spelling of 26422991 in words is "twenty-six million, four hundred twenty-two thousand, nine hundred ninety-one".