26557240 has 32 divisors (see below), whose sum is σ = 60886080. Its totient is φ = 10421632.

The previous prime is 26557207. The next prime is 26557241. The reversal of 26557240 is 4275562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26557241) 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 7 ways as a sum of consecutive naturals, for example, 4144 + ... + 8383.

It is an arithmetic number, because the mean of its divisors is an integer number (1902690).

Almost surely, 2^26557240 is an apocalyptic number.

26557240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26557240 is an abundant number, since it is smaller than the sum of its proper divisors (34328840).

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

26557240 is a wasteful number, since it uses less digits than its factorization.

26557240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12591 (or 12587 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 26557240 is about 5153.3717118019. The cubic root of 26557240 is about 298.3511018688.

The spelling of 26557240 in words is "twenty-six million, five hundred fifty-seven thousand, two hundred forty".