26280105240 has 128 divisors (see below), whose sum is σ = 80664192000. Its totient is φ = 6847746048.

The previous prime is 26280105223. The next prime is 26280105253. The reversal of 26280105240 is 4250108262.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26280105198 and 26280105207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 905271 + ... + 933849.

It is an arithmetic number, because the mean of its divisors is an integer number (630189000).

Almost surely, 2^26280105240 is an apocalyptic number.

26280105240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26280105240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40332096000).

26280105240 is an abundant number, since it is smaller than the sum of its proper divisors (54384086760).

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

26280105240 is a wasteful number, since it uses less digits than its factorization.

26280105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28769 (or 28765 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 26280105240 in words is "twenty-six billion, two hundred eighty million, one hundred five thousand, two hundred forty".