26405140 has 24 divisors (see below), whose sum is σ = 55585152. Its totient is φ = 10536480.

The previous prime is 26405129. The next prime is 26405147. The reversal of 26405140 is 4150462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26405147) 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, 8385 + ... + 11095.

It is an arithmetic number, because the mean of its divisors is an integer number (2316048).

Almost surely, 2^26405140 is an apocalyptic number.

26405140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26405140 is an abundant number, since it is smaller than the sum of its proper divisors (29180012).

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

26405140 is a wasteful number, since it uses less digits than its factorization.

26405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 26405140 is about 5138.5931926939. The cubic root of 26405140 is about 297.7804337321.

The spelling of 26405140 in words is "twenty-six million, four hundred five thousand, one hundred forty".