26440240 has 40 divisors (see below), whose sum is σ = 61714800. Its totient is φ = 10534656.

The previous prime is 26440217. The next prime is 26440243. The reversal of 26440240 is 4204462.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (26440243) 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 7 ways as a sum of consecutive naturals, for example, 27447 + ... + 28393.

It is an arithmetic number, because the mean of its divisors is an integer number (1542870).

Almost surely, 2^26440240 is an apocalyptic number.

26440240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26440240 is an abundant number, since it is smaller than the sum of its proper divisors (35274560).

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

26440240 is a wasteful number, since it uses less digits than its factorization.

26440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 26440240 is about 5142.0073901153. The cubic root of 26440240 is about 297.9123204956.

It can be divided in two parts, 264 and 40240, that added together give a palindrome (40504).

The spelling of 26440240 in words is "twenty-six million, four hundred forty thousand, two hundred forty".