26284381 has 4 divisors (see below), whose sum is σ = 26555452. Its totient is φ = 26013312.

The previous prime is 26284367. The next prime is 26284387. The reversal of 26284381 is 18348262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16736281 + 9548100 = 4091^2 + 3090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26284381 is a prime.

It is a super-2 number, since 2×26284381² = 1381737369106322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26284387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135390 + ... + 135583.

It is an arithmetic number, because the mean of its divisors is an integer number (6638863).

Almost surely, 2^26284381 is an apocalyptic number.

It is an amenable number.

26284381 is a deficient number, since it is larger than the sum of its proper divisors (271071).

26284381 is an equidigital number, since it uses as much as digits as its factorization.

26284381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271070.

The product of its digits is 18432, while the sum is 34.

The square root of 26284381 is about 5126.8295271054. The cubic root of 26284381 is about 297.3257921309.

The spelling of 26284381 in words is "twenty-six million, two hundred eighty-four thousand, three hundred eighty-one".