26440140 has 24 divisors (see below), whose sum is σ = 74032560. Its totient is φ = 7050688.

The previous prime is 26440129. The next prime is 26440159. The reversal of 26440140 is 4104462.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220275 + ... + 220394.

It is an arithmetic number, because the mean of its divisors is an integer number (3084690).

Almost surely, 2^26440140 is an apocalyptic number.

26440140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26440140 is an abundant number, since it is smaller than the sum of its proper divisors (47592420).

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

26440140 is a wasteful number, since it uses less digits than its factorization.

26440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440681 (or 440679 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 26440140 is about 5141.9976662772. The cubic root of 26440140 is about 297.9119449157.

It can be divided in two parts, 264 and 40140, that added together give a palindrome (40404).

The spelling of 26440140 in words is "twenty-six million, four hundred forty thousand, one hundred forty".