26798981 has 8 divisors (see below), whose sum is σ = 29450304. Its totient is φ = 24183520.

The previous prime is 26798971. The next prime is 26798983. The reversal of 26798981 is 18989762.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26798981 - 2⁶ = 26798917 is a prime.

It is a super-2 number, since 2×26798981² = 1436370765276722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26798983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7385 + ... + 10398.

It is an arithmetic number, because the mean of its divisors is an integer number (3681288).

Almost surely, 2^26798981 is an apocalyptic number.

It is an amenable number.

26798981 is a deficient number, since it is larger than the sum of its proper divisors (2651323).

26798981 is a wasteful number, since it uses less digits than its factorization.

26798981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17931.

The product of its digits is 435456, while the sum is 50.

The square root of 26798981 is about 5176.7732227711. The cubic root of 26798981 is about 299.2536298303.

The spelling of 26798981 in words is "twenty-six million, seven hundred ninety-eight thousand, nine hundred eighty-one".