26131380 has 144 divisors (see below), whose sum is σ = 85409856. Its totient is φ = 5918720.

The previous prime is 26131331. The next prime is 26131411. The reversal of 26131380 is 8313162.

It is a self number, because there is not a number n which added to its sum of digits gives 26131380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190672 + ... + 190808.

It is an arithmetic number, because the mean of its divisors is an integer number (593124).

Almost surely, 2^26131380 is an apocalyptic number.

26131380 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 26131380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42704928).

26131380 is an abundant number, since it is smaller than the sum of its proper divisors (59278476).

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

26131380 is a wasteful number, since it uses less digits than its factorization.

26131380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 26131380 is about 5111.8861489669. The cubic root of 26131380 is about 296.7477593968.

It can be divided in two parts, 2613 and 1380, that added together give a palindrome (3993).

The spelling of 26131380 in words is "twenty-six million, one hundred thirty-one thousand, three hundred eighty".