26802640 has 20 divisors (see below), whose sum is σ = 62316324. Its totient is φ = 10721024.

The previous prime is 26802637. The next prime is 26802653. The reversal of 26802640 is 4620862.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 16613776 = 3192^2 + 4076^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 26802599 and 26802608.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 167437 + ... + 167596.

Almost surely, 2^26802640 is an apocalyptic number.

26802640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26802640 is an abundant number, since it is smaller than the sum of its proper divisors (35513684).

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

26802640 is a wasteful number, since it uses less digits than its factorization.

26802640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335046 (or 335040 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 26802640 is about 5177.1266161839. The cubic root of 26802640 is about 299.2672487462.

The spelling of 26802640 in words is "twenty-six million, eight hundred two thousand, six hundred forty".