26007981 has 16 divisors (see below), whose sum is σ = 35683200. Its totient is φ = 16839680.

The previous prime is 26007973. The next prime is 26008007. The reversal of 26007981 is 18970062.

It is a cyclic number.

It is not a de Polignac number, because 26007981 - 2³ = 26007973 is a prime.

It is a super-2 number, since 2×26007981² = 1352830151392722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26007911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43120 + ... + 43718.

It is an arithmetic number, because the mean of its divisors is an integer number (2230200).

Almost surely, 2^26007981 is an apocalyptic number.

It is an amenable number.

26007981 is a deficient number, since it is larger than the sum of its proper divisors (9675219).

26007981 is a wasteful number, since it uses less digits than its factorization.

26007981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 26007981 is about 5099.8020549821. The cubic root of 26007981 is about 296.2799161514.

The spelling of 26007981 in words is "twenty-six million, seven thousand, nine hundred eighty-one".