26541640 has 16 divisors (see below), whose sum is σ = 59718780. Its totient is φ = 10616640.

The previous prime is 26541631. The next prime is 26541643. The reversal of 26541640 is 4614562.

It can be written as a sum of positive squares in 2 ways, for example, as 24740676 + 1800964 = 4974^2 + 1342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26541599 and 26541608.

It is not an unprimeable number, because it can be changed into a prime (26541643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 331731 + ... + 331810.

Almost surely, 2^26541640 is an apocalyptic number.

26541640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26541640 is an abundant number, since it is smaller than the sum of its proper divisors (33177140).

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

26541640 is a wasteful number, since it uses less digits than its factorization.

26541640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663552 (or 663548 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 26541640 is about 5151.8579172955. The cubic root of 26541640 is about 298.2926722427.

It can be divided in two parts, 265 and 41640, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 26541640 in words is "twenty-six million, five hundred forty-one thousand, six hundred forty".