26443440 has 120 divisors (see below), whose sum is σ = 93528240. Its totient is φ = 6676992.

The previous prime is 26443429. The next prime is 26443441. The reversal of 26443440 is 4434462.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (26443441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12714 + ... + 14646.

It is an arithmetic number, because the mean of its divisors is an integer number (779402).

Almost surely, 2^26443440 is an apocalyptic number.

26443440 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 26443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46764120).

26443440 is an abundant number, since it is smaller than the sum of its proper divisors (67084800).

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

26443440 is a wasteful number, since it uses less digits than its factorization.

26443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 26443440 is about 5142.3185432254. The cubic root of 26443440 is about 297.9243385530.

It can be divided in two parts, 2644 and 3440, that added together give a square (6084 = 78²).

The spelling of 26443440 in words is "twenty-six million, four hundred forty-three thousand, four hundred forty".