26073981 has 10 divisors (see below), whose sum is σ = 38950142. Its totient is φ = 17382600.

The previous prime is 26073967. The next prime is 26074001. The reversal of 26073981 is 18937062.

26073981 is a `hidden beast` number, since 260 + 7 + 398 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 5904900 = 4491^2 + 2430^2 .

It is not a de Polignac number, because 26073981 - 2⁶ = 26073917 is a prime.

It is a super-2 number, since 2×26073981² = 1359704970376722, 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 (26073941) 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 9 ways as a sum of consecutive naturals, for example, 160870 + ... + 161031.

Almost surely, 2^26073981 is an apocalyptic number.

It is an amenable number.

26073981 is a deficient number, since it is larger than the sum of its proper divisors (12876161).

26073981 is an equidigital number, since it uses as much as digits as its factorization.

26073981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321913 (or 321904 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 26073981 is about 5106.2687943351. The cubic root of 26073981 is about 296.5303259100.

The spelling of 26073981 in words is "twenty-six million, seventy-three thousand, nine hundred eighty-one".