26205640 has 32 divisors (see below), whose sum is σ = 59330880. Its totient is φ = 10416832.

The previous prime is 26205631. The next prime is 26205659. The reversal of 26205640 is 4650262.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4719 + ... + 8641.

It is an arithmetic number, because the mean of its divisors is an integer number (1854090).

Almost surely, 2^26205640 is an apocalyptic number.

26205640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26205640 is an abundant number, since it is smaller than the sum of its proper divisors (33125240).

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

26205640 is a wasteful number, since it uses less digits than its factorization.

26205640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101 (or 4097 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 26205640 is about 5119.1444597706. The cubic root of 26205640 is about 297.0285922131.

The spelling of 26205640 in words is "twenty-six million, two hundred five thousand, six hundred forty".