26640726 has 32 divisors (see below), whose sum is σ = 61585920. Its totient is φ = 7525056.

The previous prime is 26640721. The next prime is 26640743. The reversal of 26640726 is 62704662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (1924560).

Almost surely, 2^26640726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26640726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30792960).

26640726 is an abundant number, since it is smaller than the sum of its proper divisors (34945194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26640726 is a wasteful number, since it uses less digits than its factorization.

26640726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7228.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 26640726 is about 5161.4654895679. The cubic root of 26640726 is about 298.6634094852.

The spelling of 26640726 in words is "twenty-six million, six hundred forty thousand, seven hundred twenty-six".