26005540 has 48 divisors (see below), whose sum is σ = 60984000. Its totient is φ = 9233280.

The previous prime is 26005513. The next prime is 26005541. The reversal of 26005540 is 4550062.

It is a super-2 number, since 2×26005540² = 1352576221383200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26005541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8086 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (1270500).

Almost surely, 2^26005540 is an apocalyptic number.

26005540 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 26005540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30492000).

26005540 is an abundant number, since it is smaller than the sum of its proper divisors (34978460).

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

26005540 is a wasteful number, since it uses less digits than its factorization.

26005540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 26005540 is about 5099.5627263521. The cubic root of 26005540 is about 296.2706466647.

The spelling of 26005540 in words is "twenty-six million, five thousand, five hundred forty".