26440840 has 32 divisors (see below), whose sum is σ = 59768280. Its totient is φ = 10527232.

The previous prime is 26440811. The next prime is 26440847. The reversal of 26440840 is 4804462.

It can be written as a sum of positive squares in 4 ways, for example, as 9647236 + 16793604 = 3106^2 + 4098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26440799 and 26440808.

It is not an unprimeable number, because it can be changed into a prime (26440847) 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, 7902 + ... + 10738.

Almost surely, 2^26440840 is an apocalyptic number.

26440840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26440840 is an abundant number, since it is smaller than the sum of its proper divisors (33327440).

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

26440840 is a wasteful number, since it uses less digits than its factorization.

26440840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081 (or 3077 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 26440840 is about 5142.0657327576. The cubic root of 26440840 is about 297.9145739552.

The spelling of 26440840 in words is "twenty-six million, four hundred forty thousand, eight hundred forty".