26686380 has 144 divisors (see below), whose sum is σ = 90205920. Its totient is φ = 5870592.

The previous prime is 26686357. The next prime is 26686397. The reversal of 26686380 is 8368662.

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, 85104 + ... + 85416.

It is an arithmetic number, because the mean of its divisors is an integer number (626430).

Almost surely, 2^26686380 is an apocalyptic number.

26686380 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 26686380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45102960).

26686380 is an abundant number, since it is smaller than the sum of its proper divisors (63519540).

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

26686380 is a wasteful number, since it uses less digits than its factorization.

26686380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 26686380 is about 5165.8861776079. The cubic root of 26686380 is about 298.8339178248.

The spelling of 26686380 in words is "twenty-six million, six hundred eighty-six thousand, three hundred eighty".