26294640 has 60 divisors (see below), whose sum is σ = 81760392. Its totient is φ = 6990720.

The previous prime is 26294627. The next prime is 26294647. The reversal of 26294640 is 4649262.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26294647) 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 11 ways as a sum of consecutive naturals, for example, 79275 + ... + 79605.

Almost surely, 2^26294640 is an apocalyptic number.

26294640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26294640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40880196).

26294640 is an abundant number, since it is smaller than the sum of its proper divisors (55465752).

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

26294640 is an equidigital number, since it uses as much as digits as its factorization.

26294640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 26294640 is about 5127.8299503786. The cubic root of 26294640 is about 297.3644699619.

The spelling of 26294640 in words is "twenty-six million, two hundred ninety-four thousand, six hundred forty".