26280073 has 8 divisors (see below), whose sum is σ = 26821448. Its totient is φ = 25743744.

The previous prime is 26280047. The next prime is 26280091. The reversal of 26280073 is 37008262.

It can be written as a sum of positive squares in 4 ways, for example, as 1159929 + 25120144 = 1077^2 + 5012^2 .

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

It is a 3-Lehmer number, since φ(26280073) divides (26280073-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 26280073 - 2¹³ = 26271881 is a prime.

It is a deceptive number, since it divides R_26280072.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26280043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10315 + ... + 12607.

It is an arithmetic number, because the mean of its divisors is an integer number (3352681).

It is a Poulet number, since it divides 2^26280072-1.

Almost surely, 2^26280073 is an apocalyptic number.

It is an amenable number.

26280073 is a deficient number, since it is larger than the sum of its proper divisors (541375).

26280073 is a wasteful number, since it uses less digits than its factorization.

26280073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 26280073 is about 5126.4093671887. The cubic root of 26280073 is about 297.3095473821.

It can be divided in two parts, 262800 and 73, that multiplied together give a square (19184400 = 4380²).

The spelling of 26280073 in words is "twenty-six million, two hundred eighty thousand, seventy-three".