26006640 has 80 divisors (see below), whose sum is σ = 87958656. Its totient is φ = 6304000.

The previous prime is 26006621. The next prime is 26006641. The reversal of 26006640 is 4660062.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 26006640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26006641) 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, 2286 + ... + 7565.

Almost surely, 2^26006640 is an apocalyptic number.

26006640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26006640 is an abundant number, since it is smaller than the sum of its proper divisors (61952016).

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

26006640 is a wasteful number, since it uses less digits than its factorization.

26006640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878 (or 9872 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 26006640 is about 5099.6705775962. The cubic root of 26006640 is about 296.2748238915.

The spelling of 26006640 in words is "twenty-six million, six thousand, six hundred forty".