26998381 has 4 divisors (see below), whose sum is σ = 27013500. Its totient is φ = 26983264.

The previous prime is 26998379. The next prime is 26998403. The reversal of 26998381 is 18389962.

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 9400356 + 17598025 = 3066^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 26998381 - 2¹ = 26998379 is a prime.

It is a super-2 number, since 2×26998381² = 1457825153242322, 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 (26998331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4456 + ... + 8593.

It is an arithmetic number, because the mean of its divisors is an integer number (6753375).

Almost surely, 2^26998381 is an apocalyptic number.

It is an amenable number.

26998381 is a deficient number, since it is larger than the sum of its proper divisors (15119).

26998381 is a wasteful number, since it uses less digits than its factorization.

26998381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15118.

The product of its digits is 186624, while the sum is 46.

The square root of 26998381 is about 5195.9966320235. The cubic root of 26998381 is about 299.9940035838.

The spelling of 26998381 in words is "twenty-six million, nine hundred ninety-eight thousand, three hundred eighty-one".