26305540 has 36 divisors (see below), whose sum is σ = 56269836. Its totient is φ = 10329792.

The previous prime is 26305529. The next prime is 26305547. The reversal of 26305540 is 4550362.

It can be written as a sum of positive squares in 2 ways, for example, as 18386944 + 7918596 = 4288^2 + 2814^2 .

It is not an unprimeable number, because it can be changed into a prime (26305547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89634 + ... + 89926.

It is an arithmetic number, because the mean of its divisors is an integer number (1563051).

Almost surely, 2^26305540 is an apocalyptic number.

26305540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26305540 is an abundant number, since it is smaller than the sum of its proper divisors (29964296).

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

26305540 is a wasteful number, since it uses less digits than its factorization.

26305540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 26305540 is about 5128.8926680132. The cubic root of 26305540 is about 297.4055534293.

The spelling of 26305540 in words is "twenty-six million, three hundred five thousand, five hundred forty".